Chapter 8 Physiological and Psychological Changes During Pregnancy Flashcards
What does the pituitary gland do in preparation for pregnancy?
secretes hormones that influence ovarian follicular development, prompt ovulation, and stimulate the uterine lining to prepare for pregnancy and maintain it until the placenta becomes fully functional
-other pituitary hormones alter metabolism, stimulate lactation, produce pigmentation changes in the skin, stimulate uterine muscle contractions, prompt milk ejection from the breasts, allow for vasoconstriction to maintain blood pressure, and regulate water balance
After conception, what happens to ovulation?
it ceases
The corpus luteum produces what?
progesterone and estrogen (placenta produces these)
Which hormone is primarily responsible for maintaining pregnancy?
progesterone
-“pro-pregnancy” hormone
What happens once implantation occurs?
the trophoblast secretes human chorionic gonadotrophin (hCG) to prompt the corpus luteum to continue progesterone production until this function is taken over by the placenta
The ovarian hormones responsibilities
ovarian hormones work in synchrony to maintain the endometrium, provide nutrition for the developing morula and blastocyst, aid in implantation, decrease the contractility of the uterus to prevent spontaneous abortion, initiate development of the ductal system in the breasts, and prompt remodeling of maternal joint collagen
What provides hormones essential to the survival of the pregnancy and fetus?
the placenta
What are the Placental hormones responsible for?
- prevent the normal involution of the ovarian corpus luteum
- stimulate production of testosterone in male fetus
- protect the pregnancy from the maternal immune response
- ensure that added glucose, protein, and minerals are available for the fetus
- prompt proliferation of the uterus and breast glandular tissue
- promote relaxation of the woman’s smooth muscle
- create a loosening of the pelvis and other major joints
What is the effect of estrogen?
growth
- estrogen prompts hyperplasia and hypertrophy (growth of cells in number and size) during pregnancy
- because of effects of estrogen, breast tissue enlarges and becomes functional and the uterus expands, a process that allows for stretching of the muscles to accommodate the growing fetus
- estrogen also enhances uterine contractility to prepare the muscles for labor
What is the effect of progesterone?
maintenance
- enables the pregnancy to thrive by its relaxation effect on the smooth muscle
- progesterone causes vasodilation and an increased blood flow to all body tissues
- it slows the gastrointestinal tract to ensure absorption of essential nutrients for fetal development
- relaxes the uterine muscle to prevent the onset of labor until term
- called the “pro-pregnancy” hormone
Major pregnancy hormones
estrogen and progesterone
Reproductive system effects of estrogen
- breast tissue enlargement
- uterine tissue enlargement
- increased uterine contractility
Reproductive system effects of progesterone
- slowing of gastrointestinal tract
- relaxation of uterus and all smooth muscle
- vasodilation, increased blood flow
What is considered the “home” for the growing fetus?
the uterus
Braxton Hicks Contractions
- irregular and painless
- may begin at 16 weeks of gestation
As pregnancy advances and the fetal size increases, what happens to the contractions?
become increasingly more frequent and intense and are easily felt by the woman
Until late in the second trimester, what are the contractions purpose?
to prepare the uterine muscles for the synchronized activity necessary for effective labor
Contractions in their normalcy
- irregular in frequency
- last for less than 60 seconds
Contractions: When to call provider
- pattern of regular contractions is noted
- contractions are associated with bleeding, nausea, vomiting, or intense pain
What does the increased blood flow from progesterone do for the body?
provides adequate circulation for endometrial growth and placental function
-the enhanced uterine circulation is important for ensuring adequate fetal nutrition and the removal of waste products
After implantation, the endometrium lining the uterus is termed what?
decidua
Decidua: Three layers
- Decidua vera
- Decidua basalis
- Decidua capsularis
Decidua Vera
external layer, no contact with fetus
Decidua Basalis
uterine lining beneath the site of implantation
Decidua Capsularis
endometrial tissue that covers the embryo
At 20 weeks, the fundus growth is at the level of
the umbilicus
At 36 weeks, the fundus should be at the level of what in growth?
the level of the xiphoid process
- “highest level”
- may feel SOB–> rest, if it does not get better call provider or get to hospital
What is one of the earliest signs of pregnancy?
discoloration, or bluish purple hue, that appears on the cervix, vagina, and vulva (Chadwick’s sign)
Chadwick’s sign
earliest signs of pregnancy
-color change; discoloration or bluish purple hue, that appears on the cervix, vagina, and vulva
How do Chadwick’s sign come about?
high levels of circulating estrogen cause stimulation of the cervical glandular tissue, which increases in cell number and becomes hyperactive
-increased blood flow and engorgement produces the bluish discoloration
Goodell’s sign
- cervical softening
- stimulation from estrogen and progesterone produces cervical softening
- related to a decrease in the collagen fibers of the connective tissue, increased vascularity and edema, and slight tissue hypertrophy and hyperplasia
The Cervix, Before and After pregnancy
- Before: is firm, and texture resembles tip of nose
- After conception: cervix softens and texture resembles that of an ear lobe
Operculum
mucus plug
-cervical mucus fills the endocervical canal and forms a mucus plug
-helps keep harmful agents out of the uterus
(estrogen and progesterone cause a proliferation of mucus-producing cervical glands)
Leukorrhea
increased whitish vaginal discharge
- results from hyperplasia of the vaginal mucosa and increased mucus production from the endocervical glands
- as due date approaches, cervical effacement and dilation cause a breakdown of the mucus plug (operculum), resulting in an increased vaginal discharge
- leukorrhea is normal during pregnancy
When to call provider about Leukorrhea?
- discharge appears thicker
- becomes bloody or yellowish/green
- accompanied by foul odor
- causes itching, irritation, or pain in the vulvar or vaginal area
Changes in the Vagina and Vulva
- increased blood flow (hyperemia) produces a purple hue (Chadwick’s sign)
- thickening of the vaginal mucosa develops
- rugae (vaginal folds) become more prominent
- leukorrhea results from increased cervical mucus along with elevated glycogen levels which produces rapid sloughing of tissue
- elevated glycogen create a vaginal environment more susceptible to the growth of Candida albicans; more susceptible to yeast infections
- pH of vaginal fluids becomes more acidic and decreases from 6.0 to 3.5 (help control the growth of pathogens in vaginal canal)
Vagina and Vulva Changes: Rugae
rugae (vaginal folds) deepen from hyperplasia and hypertrophy of the epithelial and elastic tissues
- this change allows for adequate stretching of the vaginal vault during childbirth
- as pregnancy progresses, this area becomes edematous from poor venous return caused by the weight of the gravid uterus
Vulvar hygiene
gentle external cleansing with plain soap and water
-douching, or internal cleansing should be avoided because it can alter the pH and allow pathogens to grow as well as disrupt the cervical mucus plug
Ovaries
after ovulation, the pituitary hormone luteinizing hormone (LH) stimulates the corpus luteum (functional cyst that remains on the ovary) to produce progesterone for 6 to 7 weeks
- once the placenta is developed and functional, it begins to take over the task of progesterone production
- the corpus luteum ceases to function and is gradually absorbed by the ovary
- the corpus luteal cyst enlarges while functioning and may reach the size of a golf ball before it begins to recede
- in some cases, the cyst may rupture, causing some pelvic discomfort associated with bleeding into pelvic cavity
- the pain should dissipate as the cyst and blood are absorbed
- if the pain is still persistent or if vaginal bleeding occurs, the nurse should advise the woman to seek medical care
Why does ovulation cease during pregnancy?
because of the high circulating levels of estrogen and progesterone, which inhibit pituitary release of follicle stimulating hormone (FSH) and LH
What Happens to the Breasts During Pregnancy?
estrogen and progesterone produce changes in the mammary glands
- breast enlargement, fullness, tingling, and increased sensitivity happen in early weeks of gestation
- superficial veins become more prominent
- nipples become more tender and more pronounced with darkening of the areola
- Montgomery tubercles (sebaceous glands) on and around the areola enlarge and provide lubrication for the nipple tissue
- striae gravidarum (stretch marks)
Montgomery tubercles
(sebaceous glands)
on and around the areola enlarge and provide lubrication for the nipple tissue
Striae gravidarum
stretch marks
-may develop as breast tissue stretches
Integumentary system changes
- darkening of the areolae
- appearance of linea nigra
- striae gravidarum
Pre-colostrum
- during second trimester
- a clear thin fluid
- found in acini cells, smallest part s of the milk glands
- becomes colostrum
Colostrum
creamy whitish-yellow liquid that may leak from the nipples as early as the 16th week of gestation
- contains antibodies, essential proteins, and fat to nourish the baby and prepare his intestines for digestion and elimination
- colostrum is converted to mature milk during the first few days after birth
What should the nurse discuss during prenatal care?
- need for changes in bra size
- options for infant feeding
- if breastfeeding, strategies to help prepare for successful breastfeeding
- process of lactation reviewed
- give list of lactation support resources
- soft cotton liners can be used to pad the bra if leaking of the nipples is troublesome
Integumentary system changes
estrogen, progesterone, and alpha-melanocyte-stimulating hormones cause many changes in the appearance
- may negatively affect woman’s self-concept and body image
- number of pigmentation changes related to the influence of estrogen
- linea nigra
- chloasma (Melasma gravidarum)
- alterations in hair and nails
- striae gravidarum
- angiomas
- palmar erythema
Integumentary Changes: Pigmentation changes
- moles (nevi), freckles, and recent scars may darken or appear to multiply in number
- the nipples, areolae, axillae, vulvar area, and perineum darken in color
Integumentary Changes: Linea alba/ Linea nigra
linea alba is a light line that extends from the umbilicus to the mons pubis (and sometimes upward to the xiphoid process) darkens, becoming the linea nigra
-the linea is more noticeable in the woman with naturally darker complexion
Integumentary Changes: Cholasma
aka Melasma gravidarum
- forms the “mask of pregnancy”
- dark, blotchy brownish pigmentation change occurs around the hairline, brow, nose, and cheeks
- gives appearance of “raccoon eyes”
- fades after pregnancy but can recur after exposure to the sun
During Pregnancy what should the nurse educate the patient about when going outside?
during pregnancy the skin becomes photosensitive, and sunburn may occur in a shorter exposure time than usual
- importance of regular sunscreen
- decreased sun exposure time
Integumentary Changes: Striae Gravidarum
increased adrenal steroid levels cause the connective tissue to lose strength and become more fragile
- causes “stretch marks”
- on breasts, buttocks, thighs, and abdomen
- appear as reddish, wavy. depressed streaks that will fade to a silvery white color after birth, but do not usually disappear completely
Integumentary System Changes: Angiomas
“vascular spiders”
- tiny, bluish, end-arterioles that occur on the neck, thorax, face, and arms
- may appear as star-shaped or branched structures that are slightly raised and do not blanch with pressure
- more common in Caucasian women
- appear most often during the second to fifth month of pregnancy and usually disappear after birth
Integumentary Changes: Palmar erythema
color changes over the palmar surfaces of the hands
-presents as a diffuse, reddish-pink mottling of the palms
Integumentary Skin Changes: Other skin changes
- increased blood flow, along with high levels of circulating hormones can produce inflammatory pruritis and acne vulgaris, seen in the first trimester
- hyperactivity of the sweat and sebaceous glands may cause excessive perspiration, night sweats, and skin changes that range from extreme dryness to extreme oiliness
Anticipatory guidance for Integumentary changes
- offer reassurance
- recommendations of daily bathing, liberal use of lotions or oils for dry skin, regular use of deodorant, and limited sun exposure with diligent use of sunscreen
Neurological System Changes
- decreased attention span
- poor concentration
- memory lapses during and shortly after pregnancy
- reduced sleep efficiency
- carpal tunnel syndrome
- syncope
Neurological System Changes: Carpal tunnel syndrome
manifested by pain and paresthesia (a burning, tingling, or numb sensation) in the hand that radiates to the elbow
- the pain occurs in one (usually the dominant) or both hands and is intensified with attempts to grasp objects
- usually subsides after the pregnancy (and the accompanying edema) has ended although some may require surgical treatment if symptoms persist
- usually develops during third trimester
How does Carpal tunnel syndrome occur?
edema from vascular permeability can lead to a collection of fluid in the wrist that puts pressure on the median nerve lying beneath the carpal ligament
-causes pain and paresthesia (burning, tingling, or numb sensation) in the hand that radiates to the elbow
Neurological System Changes: Syncope
transient loss of consciousness and postural tone with spontaneous recovery
How does Syncope Occur during pregnancy?
- attributed to orthostatic hypotension and/ or inferior vena cava compression by the gravid uterus
- occur as increased intra-abdominal pressure from the growing uterus places pressure on the vagus nerve
- coughing, straining during bowel movements, and upward pressure from the growing fetus can trigger a vasovagal response that produces faintness or loss of consciousness