ANTE--PARTUM. Lecture 1. PHYSICAL CHANGES OF PREGNANCY Flashcards
What is the etymology of obstetrics?
The term “obstetrics” has its origins in the Latin word “obstetricia,” which is derived from the Latin words “obstetrix” (meaning “midwife”) and “obstare” (meaning “to stand before” or “to assist”). The term has been used for centuries to refer to the medical specialty focused on pregnancy, childbirth, and the postpartum period, specifically involving the care of pregnant women and the delivery of babies. In ancient times, midwives played a crucial role in assisting women during childbirth, and the term “obstetrics” has evolved to encompass the broader medical field of managing pregnancy and childbirth.
The etymology of “obstetrics” reflects the historical importance of midwives and their role in providing care and support to expectant mothers. Over time, the field of obstetrics has advanced with medical knowledge and technology, encompassing various aspects of maternal and fetal health, labor and delivery, and postpartum care.
Nulligravida
Nulligravida: This term refers to a woman who has never been pregnant before and is currently not pregnant.
“Nulli-“ comes from the Latin word “nullus,” which means “none” or “no.”
“Gravida” comes from the Latin word “gravidus,” which means “pregnant.”
Nulli- para
Nullipara: A nullipara is a woman who has never given birth to a child who reached the stage of fetal viability, typically considered to be around 20 weeks (5 months ) of gestation or weighing about 500 grams.
Coz basically after 5months is as if you had given birth !
Prima-gravida
Primagravida: This term is used to describe a woman who is pregnant for the first time, regardless of the outcome of the pregnancy.
Primi-para
Primipara: A primipara is a woman who has given birth to her first child who reached the stage of fetal viability.
Multi-gravida
Multigravida: This term is used to describe a woman who has been pregnant more than once, regardless of the outcomes of those pregnancies.
Multipara
Multipara: A multipara is a woman who has given birth to two or more children who reached the stage of fetal viability. 5 months/20 weeks
What is Hagar’s sign? first 4 to 6 weeks
“Hagar’s sign” refers to a physical sign that can sometimes be observed during a pregnancy-related examination. It involves the appearance of a softening or bluish discoloration of the cervix, particularly around the area of the external os (the opening of the cervix into the vagina). This sign is named after Dr. Aharon Hagar, an Israeli obstetrician and gynecologist who described it.
Hagar’s sign is considered a potential indicator of early pregnancy, as it is thought to result from increased blood flow and hormonal changes in the cervix in response to pregnancy. However, it’s important to note that Hagar’s sign is not a definitive or widely relied-upon diagnostic tool. Other signs and tests, such as urine or blood pregnancy tests, ultrasound examinations, and clinical assessments, are more commonly used to confirm pregnancy.
While Hagar’s sign may be mentioned in some medical literature, it is not as commonly used or discussed as other signs and symptoms of pregnancy. It’s always best to consult with a qualified healthcare professional for accurate and reliable information regarding pregnancy-related signs and tests.
GRAVIDA:
The number of confirmed pregnancies a woman has had.
“Gravida” is a term used in medical contexts to indicate the number of times a woman has been pregnant, regardless of the outcome of those pregnancies (whether they resulted in live births, stillbirths, miscarriages, etc.). It’s often used as a prefix along with a number to describe a woman’s obstetric history.
GRAVIDA etymology
The term “gravid” comes from the Latin word “gravidus,” which means “pregnant” or “heavy with child.” It is derived from the combination of two Latin words: “gravis,” meaning “heavy” or “burdensome,” and “avidus,” meaning “eager” or “desirous.” The word “gravidus” conveys the idea of being burdened or filled with something, in this case, being pregnant and carrying the weight of a developing fetus. In medical terminology, “gravid” is used to describe the state of being pregnant or carrying a developing embryo or fetus within the womb.
PARA? Parir
PARA: the number of births a woman has had after 20 weeks gestation, living or not.
what is GTPAL?
Exactly, you’ve provided an accurate breakdown of the GTPAL system used in obstetrics and gynecology to describe a woman’s obstetric history. Each letter in the acronym represents a specific aspect of a woman’s pregnancies:
G (Gravidity): The total number of times a woman has been pregnant, regardless of the outcome (whether the pregnancy resulted in a live birth, stillbirth, miscarriage, or abortion).
T (Term births): The number of pregnancies that reached full term, typically considered to be 37 to 42 weeks of gestation.
P (Preterm births): The number of pregnancies where the fetus was delivered before reaching full term, i.e., before 37 weeks of gestation.
A (Abortions and miscarriages): The number of pregnancies that ended before 20 weeks of gestation due to miscarriage or elective abortion.
L (Living children): The number of currently living children resulting from previous pregnancies.
The GTPAL system is a useful way for healthcare providers to quickly understand a woman’s obstetric history and assess her risk factors for various pregnancy-related conditions.
G/P
G = Gravidity/P=Parity
Check tale slide 8
MUST
A Pregnant woman with four children reports the following history: a still birth at 32 weeks, triplets born via c/s at 30 weeks gestation, SAB at 8 weeks gestation, and a daughter born vaginally at 39 weeks gestation. What accurately expresses this woman’s current obstetric history using
G-T-P-A-L
TERMS TO KNOW
Late preterm: 34-36 6/7 weeks
Early term: 37-38 6/7 weeks
Full term: 39-40 6/7 weeks
Late term: 41-41 6/7 weeks
Post term: 42+
SIGNS OF PREGNANCY: PRESUMPTIVE. definition only
CHANGES THAT MAKE THE WOMAN THINK SHE MIGHT BE PREGNANT
Presumptive signs of pregnancy are those changes that a woman might perceive as potential indicators of pregnancy. These signs are based on the woman’s subjective experiences and perceptions. It’s important to note that these signs are not definitive proof of pregnancy and can often be caused by other factors as well. Here are some examples of presumptive signs of pregnancy under the letter “A”:
SIGNS OF PREGNANCY: PROBABLE. definition
CHANGES ON PHYSICAL EXAM THAT MAKE THE EXAMINER SUSPECT THE WOMAN MIGHT BE PREGNANT
SIGNS OF PREGNANCY: POSITIVE
CHANGES THAT CAN ONLY BE EXPLAINED BY PREGNANCY.
SIGNS OF PREGNANCY 2.0. PRESUMPTIVE. The actual signs
Amenorrhea: This refers to the absence of menstrual periods. In the context of pregnancy, it is one of the early signs that may indicate a woman is pregnant since pregnancy often stops regular menstrual cycles.
Enlarged Breasts: Hormonal changes during pregnancy can lead to breast enlargement and tenderness as the body prepares for breastfeeding.
Nausea and Vomiting: Commonly known as morning sickness, many pregnant individuals experience nausea and vomiting, especially during the early stages of pregnancy. It is thought to be related to hormonal changes.
Quickening: (kick) Quickening refers to the first movements of the baby felt by the pregnant person. It’s often described as fluttering sensations in the abdomen. Quickening is generally felt in the second trimester.
Fatigue: Hormonal changes and increased metabolic demands during pregnancy can lead to feelings of tiredness and fatigue.
Urinary Frequency: As the uterus expands and puts pressure on the bladder, pregnant individuals may experience increased urinary frequency, needing to urinate more often.
SIGNS OF PREGNANCY 2.0 PROBABLE
Goodell Sign: Softening of the cervix due to increased blood flow and hormone changes. This can be a sign of pregnancy, but it’s not exclusive to it.
Chadwick’s Sign: Bluish or purplish coloration of the cervix, vagina, and labia due to increased blood flow. It’s another sign that can suggest pregnancy but isn’t conclusive.
Hegar’s Sign: Softening and compressibility of the lower uterine segment, which can be felt during a pelvic examination. It’s a sign that the uterus is preparing for pregnancy, but it’s not definitive on its own.
Positive Pregnancy Test: A positive result on a pregnancy test can strongly indicate pregnancy, but additional confirmation through other signs and a medical assessment is usually needed.
Braxton Hicks: These are sporadic, irregular contractions of the uterus that can be felt during pregnancy. While they can be a sign of pregnancy, they can also occur in non-pregnant individuals.
Ballotment: A technique in which the fetus is pushed and then bounces back slightly when touched through the vaginal wall during a pelvic exam. This can suggest pregnancy, but it’s not exclusive to it.
Enlarged Uterus: An enlarged uterus can be a sign of pregnancy, but it can also be caused by other factors.
SIGNS OF PREGNANCY 2.0 POSITIVE
-Visualize the Fetus
-Fetal Heart Tones
-Palpate the fetus
Hormonal Changes/Adaptation of Pregnancy
Estrogen:
Secreted by the corpus luteum until the placenta takes over.
Inhibits secretion of FSH and LH from the anterior pituitary, suppressing ovulation.
Stimulates the growth of maternal tissues such as the uterus, breast tissue, and genitalia.
Relaxes joints and ligaments in the pelvis to facilitate childbirth.
Increases vascularity (blood vessel development).
Progesterone:
Secreted by the corpus luteum until the placenta takes over.
Inhibits secretion of FSH and LH from the anterior pituitary, suppressing ovulation.
Relaxes smooth muscle, leading to decreased uterine contractility and helping to prevent contractions during early pregnancy.
Hormones that Affect Changes During Pregnancy:
Serum Prolactin: Prepares the breasts for lactation, which is the production of milk.
Oxytocin: Stimulates contractions of the uterus during labor and is also responsible for milk ejection (let-down) during breastfeeding.
Human Chorionic Somatomammotropin (Human Placental Lactogen): Acts as a growth hormone for the fetus, decreases the mother’s metabolism of glucose (helping to provide more glucose to the fetus), and increases the availability of fatty acids for the mother’s metabolic needs.
Physical Changes/Adaptation of Pregnancy
UTERUS:
Amenorrhea
Endometrium support growth of embryo/fetus
Increase in elastic properties
Hagar’s sign
Increase in uterine blood flow
Braxton Hicks Contractions
Quickening
Physical Changes/Adaptation of Pregnancy. Hagar’s Sign?
Probable Sign of Pregnancy,
(6 weeks)
Check osmosis
Physical Changes/Adaptation of Pregnancy. VAGINA
Increase in Vaginal Mucosa: + mucosa means another layer of protection leading to + protection for the baby. +also it’s to make it easier for the baby to slide out hahah
Loosening of Connective Tissue: The hormone relaxin, which is produced during pregnancy, causes the relaxation of various ligaments and connective tissues in the body, including those around the pelvic area. This loosening of connective tissue helps prepare the body for childbirth by allowing the pelvic bones to slightly shift and accommodate the baby’s passage through the birth canal.
Lengthening of the Vaginal Vault: As pregnancy progresses, the cervix and vaginal vault may undergo changes to accommodate the growing fetus. These changes are part of the body’s preparation for childbirth.
Increase in Vascularity: The increased blood flow to the pelvic region during pregnancy can also lead to increased vascularity in the vaginal area. This increased blood supply is important for supporting the developing fetus and maintaining the health of the reproductive organs.
Chadwick Sign: The Chadwick sign is a bluish or purplish discoloration of the cervix, vaginal walls, and vulva that can occur as early as 6 to 8 weeks of pregnancy. It’s caused by increased blood flow to the area due to hormonal changes. This sign can be an early indicator of pregnancy. 6-8 weeks
Physical Changes/Adaptation of Pregnancy. VAGINA 2.0
Leukorrhea:
Leukorrhea refers to an increased vaginal discharge that is usually thin, white, milky, and mild-smelling. It’s a common occurrence during pregnancy due to increased blood flow to the pelvic area and hormonal changes. Leukorrhea helps maintain the cleanliness of the vaginal area and prevent infections by flushing out old cells and debris.
Acidic Environment and Yeast Infections:
During pregnancy, the vaginal pH can rise from its normal acidic range of around 3.8 to 4.5 to a slightly higher (more alkaline) level, typically ranging from 4.5 to 6.0 or even higher in some cases. This increase in pH is due to the hormonal changes, particularly the elevated levels of estrogen, that occur during pregnancy.
The vagina naturally maintains an acidic pH level, which helps keep the vaginal microbiome balanced and healthy. This acidic environment is created by the presence of beneficial bacteria. However, disruptions in this balance can lead to an overgrowth of yeast (Candida) and result in yeast infections. Pregnancy can sometimes alter the vaginal pH balance, increasing the risk of yeast infections.
Mucus Plug (Operculum): on top of cervix but before uterus
The mucus plug, also known as the operculum, is a gelatinous substance that forms in the cervix during pregnancy. Its purpose is to seal the cervical opening, providing a protective barrier that helps prevent the entry of bacteria and other potential contaminants into the uterus, where the developing fetus is located. As labor approaches, the mucus plug may be released or discharged, sometimes indicating that the cervix is beginning to dilate in preparation for childbirth.
Physical Changes/Adaptation of Pregnancy. BREASTS
- Become larger
Mammary Glands Grow: During the 2nd and 3rd trimesters of pregnancy, the mammary glands (breast tissue) undergo significant changes in preparation for breastfeeding. Hormonal shifts, particularly increased levels of estrogen and progesterone, stimulate the growth of mammary glands. This growth is essential to accommodate the production of milk for the baby after birth.
Increased Pigmentation: (look similar to goosebumps on the nipple and surrounding areola) Many pregnant women experience changes in skin pigmentation due to hormonal fluctuations, primarily an increase in melanin production. This can lead to areas of the skin, such as the areolas and the linea nigra (a dark line that runs vertically down the abdomen), becoming darker and more noticeable. This is a normal and temporary change that typically fades after pregnancy.
Montgomery Tubercles More Pronounced: Montgomery tubercles are small, raised bumps on the areola (the darker area around the nipple). These tubercles become more pronounced and may enlarge during pregnancy. They are thought to play a role in lubricating the nipple and protecting it during breastfeeding.
Increase Vascularity: Increased blood flow and vascularity are common during pregnancy due to the body’s need to support both the mother and the developing fetus. This heightened vascularity is especially prominent in areas such as the breasts. The increased blood supply is necessary to provide oxygen and nutrients to the growing mammary glands and the baby.
These changes are all part of the body’s natural response to pregnancy and are influenced by hormonal shifts and the physiological demands of gestation. It’s important to note that while these changes might be unfamiliar or even concerning, they are typically considered normal during pregnancy. If you have any concerns about your pregnancy or experience unusual symptoms, it’s always a good idea to consult with a healthcare professional for guidance and reassurance.
- Increase vascularity
Physical Changes/Adaptation of Pregnancy. THE CARDIOVASCULAR SYSTEM
Increase in Blood Volume: The body increases its blood volume by around 40-50% during pregnancy. This additional blood helps provide sufficient oxygen and nutrients to both the mother and the developing fetus.
Increased Heart Rate: The heart rate typically increases by about 10-15 beats per minute. This is a result of the increased demand for oxygen and nutrients by the mother and the fetus. Also to push all that blood.
Increased Cardiac Output: Cardiac output, which is the amount of blood pumped by the heart per minute, increases by 30-50% during pregnancy. This is due to the combination of increased heart rate and increased stroke volume (the amount of blood pumped per heartbeat). makes sense 100%
Vasodilation: Blood vessels undergo vasodilation, which means they widen. This allows for improved blood flow and helps manage the increased blood volume and cardiac output.
Blood Pressure Changes: Blood pressure tends to decrease slightly in early pregnancy due to the vasodilation and hormonal changes. However, around the 32nd week of pregnancy, it starts to gradually return to pre-pregnancy levels. It’s important to monitor blood pressure regularly during pregnancy, as high blood pressure can be a concern.
Hypercoagulation: Pregnancy causes the blood to have a higher tendency to clot. This is a protective mechanism to minimize bleeding during childbirth but can also increase the risk of thrombosis. This hypercoagulable state helps prevent excessive bleeding during delivery but also poses a potential risk for blood clots.
Dependent Edema: Edema, or swelling, is common during pregnancy. Due to the pressure exerted by the growing uterus on blood vessels, fluid can accumulate in the lower extremities, causing swelling in the ankles and feet.
Physical Changes/Adaptation of Pregnancy. Cardiac Hypertrophy
Displaced by the enlarging uterus which pushes up on the diaphragm.
Displaced by the enlarging uterus which pushes up on the diaphragm.
Cardiac Hypertrophy during Pregnancy:
Cardiac hypertrophy refers to the enlargement of the heart muscle, usually due to an increase in the size of individual cardiac muscle cells. During pregnancy, the cardiovascular system undergoes various adaptations to accommodate the increased demands of the developing fetus and changes in the mother’s body.
- Increased Blood Volume: One of the most significant changes is the increase in blood volume to support the growing fetus and the needs of the placenta. This leads to an increase in cardiac output, which is the amount of blood the heart pumps per minute. Cardiac hypertrophy helps the heart to generate a higher cardiac output to meet these increased demands.
- Hormonal Changes: Hormones like estrogen and progesterone rise significantly during pregnancy. These hormones can have direct effects on the heart, leading to changes in heart rate and cardiac muscle function.
- Pressure Changes: The enlarging uterus exerts pressure on the diaphragm and displaces abdominal organs. This can lead to changes in thoracic pressure and the position of the heart within the chest cavity. These changes can contribute to palpitations and altered cardiac murmurs.
- Heart Murmurs, Palpitations, and Arrhythmias: As the heart adapts to the increased workload and hormonal changes, it’s common for pregnant women to experience heart murmurs, palpitations, and even arrhythmias. Most of these changes are benign and related to the increased blood flow and hormonal influence on the heart. However, any significant or concerning symptoms should be evaluated by a healthcare provider.
95% women develop systolic murmurs, palpitations and arrhythmias.
PHYSIOLOGICAL ANEMIA OFPREGNANCY
For adult women: Approximately 12.0 to 15.5 grams per deciliter (g/dL) of blood.
In the first and third trimesters, if the hemoglobin level drops below 11 g/dl, the woman is considered anemic.
In the second trimester, if the hemoglobin level drops below 10.5 g/dl, the woman is considered anemic.
Additionally, if the hematocrit (HCT) level falls below 32%, the woman is considered anemic.
During pregnancy, a woman’s blood volume expands to support the growing fetus and provide adequate oxygen and nutrients. However, the increase in plasma volume outpaces the increase in red blood cell production, leading to a dilutional effect on the concentration of red blood cells and hemoglobin in the blood. This can result in slightly lower hemoglobin (it’s a component of RBC aka erythrocytes that carries iron and O2) and hematocrit levels. (%of RBC aka erythrocytes )
The hemoglobin and hematocrit thresholds you’ve mentioned are commonly used as diagnostic criteria for defining anemia in pregnant women. Anemia during pregnancy is defined by different hemoglobin and hematocrit cutoffs compared to non-pregnant individuals due to the changes in blood volume that naturally occur during gestation. The values you provided—hemoglobin levels below 11 g/dl in the first or third trimester, below 10.5 g/dl in the second trimester, or a hematocrit of 32%—indicate the thresholds at which a pregnant woman would be considered anemic.
Supine hypotensive syndrome (also referred to as inferior vena cava compression syndrome)
Supine hypotensive syndrome, also known as inferior vena cava compression syndrome or aortocaval compression syndrome, is a medical condition that can occur during pregnancy. It primarily affects pregnant women when they lie flat on their backs (in the supine position). The syndrome is caused by the pressure of the growing uterus on the inferior vena cava, a large vein that carries deoxygenated blood from the lower half of the body to the heart.
As the uterus enlarges during pregnancy, especially in the later stages, it can exert pressure on the inferior vena cava when the pregnant woman lies on her back. This pressure can obstruct blood flow, leading to a reduction in the return of blood to the heart and a subsequent decrease in blood pressure. This drop in blood pressure can cause symptoms such as dizziness, lightheadedness, nausea, and even fainting.
To alleviate the symptoms and prevent complications, pregnant women are often advised to avoid lying flat on their backs, especially during the later stages of pregnancy. Instead, they are encouraged to lie on their left side, which helps to relieve the pressure on the inferior vena cava and maintain proper blood flow to the heart and the baby.
It’s important to note that while supine hypotensive syndrome is more common during pregnancy due to the physical changes in the body, it can also occur in non-pregnant individuals who experience pressure on the inferior vena cava due to factors such as obesity, certain medical conditions, or the positioning during surgery.