Maternal Adaptation: Reproductive System, Metabolism, Hematology Flashcards
How much volume can a gravid uterus contain?
5-20L
Mass of a gravid uterus
1100g
Shape of a non-pregnant uterus
pear-shaped
Thickness of a gravid uterus
2 cm
True or False: Enlargement of the uterus is due to hyperplasia
False. It is due to hypertrophy. No myocytes are produced
When do estrogen and progesterone play a part in the hypertrophy of the uterus?
before the 12th week
True or False: Before the 12th week, uterine hypertrophy is caused by mechanical distention naturally-occurring during pregnancy
False. It is due to hormonal changes
True or False: >12 weeks, uterine hypertrophy is caused by hormonal changes
False. It is due to mechanical distention
In a non-pregnant female, which parts of the reproductive system attach near the apex?
Broad ligament, round ligament, fallopian tubes
What accumulates and provides strength and stretchability to the outer muscular layer of the uterus?
fibrous tissue
Aside from fibrous tissue what else is increased in the muscular layer of the uterus?
elastic tissue
Arrangement of uterine muscular layer
Outer “Hood” > Middle > Inner
Most important muscular layer of the uterus; contains vessels arranged in a figure 8 and act as ligatures to prevent hemorrhage during delivery
Middle Muscular
What does the inner muscular layer of the uterus surround?
Fallopian Tube and Internal Os
Size and shape of the uterus by the 12th week
spherical
Size and shape of the uterus by the 1st week
flat and pear-shaped
Size and shape of the uterus beyond the 12th week
ovoid
Where does the growing embryo displace the intestines?
Laterally and superiorly
Patients complain of pain in which abdominal quadrant during pregnancy?
RUQ
Kinds of positions of the uterus
Dextrorotation, Standing, Supine
What is the danger posed by the dextrorotation of the uterus during pregnancy?
Exposure of uterine vessels (specifically, arteries) as they are pushed anteriorly during a Cesarean section
Implication of the standing uterus
Continuous with the pelvic inlet; presses against the abdomen in women with 3 or more pregnancies; lax abdominal wall (nabanat na eh)
Which vessels does the supine uterus occlude?
IVC and aorta
How do you manage the effects of a supine uterus?
Have the mother lie on her side to ease back pain and vessel occlusion
What do you call contractions during the 1st trimester?
Braxton-Hicks contractions
Are contractions during the 1st trimester a cause for concern?
No. These are painless and irregular and are also known as “false labor”
By what trimester can contractions be detected by bimanual examination (use of both hands; palpation)
2nd trimester
How much of the total blood flow does the uterus receive in non-pregnant women?
1% only
How much of the total blood flow does the uterus receive in pregnant women? (near term)
almost 20% (450-650mL)
Consistency of the cervix in pregnant women?
soft (like lips)
Consistency of the cervix in non-pregnant women?
doughy (like the nose)
True or False: cervical glands undergo both hyperplasia and hypertrophy
True. As opposed to myocytes of the uterus which only undergo hypertrophy
How much of the entire cervical mass do the hypertrophied, hyperplasic cervical glands occupy?
Almost half
True or False: There is an inversion of proliferating columnar glands in the cervix
False. EVERSION.
Contents of the cervical mucus plug
immunoglobulins and cytokines (prevent infection)
When the mucus plug is expelled along with blood during delivery, what is it called?
bloody show
For how long does the corpus luteum maintain progesterone in the endometrium?
6-7 weeks
In benign tumors, do we wait until 8 weeks to remove it from the ovaries?
Yes, to be sure it will not affect any fetus in case the woman is pregnant (it is always safer to let the 6-7 weeks pass)
In malignant tumors, do we wait until 8 weeks to remove it from the endometrium?
No. It’s malignant!
Where does the decidual reaction take place?
On and beneath the ovaries
What is the average diameter of the vascular pedicle (ovarian blood vessels) in pregnant women? In non-pregnant women?
2.6 in pregnant. 0.9 in non-pregnant
When was pregnancy luteoma discovered and who discovered it?
1963, Sternberg
microscopic to >20cm cells that regress spontaneously after delivery
pregnancy luteoma
Does the trophoblast have a capacity to convert androgens and androgen-like steroids to estrogen?
Yes. This is demonstrated in the pregnancy luteoma
What causes theca lutein cysts?
Exaggerated follicle stimulation
Which cyst would show as “honeycomb” in appearance? Pregnancy Luteoma? or Theca Lutein Cysts?
Theca Lutein Cysts
True or False: Pregnancy Luteoma is associated with high levels of hCG (seen in trophoblastic disease-causing-tumors or twin pregnancies)
False. Theca Lutein Cysts