physiologic changes during preg Flashcards
during pregnancy endometrium becomes specialized & is called
decidua
during pregnancy uterus leaves pelvis & ascends to
abdominal cavity
uterus length increases to
6.5 to 32 cm
uterus depth increases to
2.5 to 22 cm
uterus width expands to
4 to 24 cm
uterus weight increases to
50-1000 g
changes in shape and size of uterus include
stretching & marked hypertrophy of muscle cells
38wk AOG, fetal head settles in pelvis to prepare for birth; breathing is much easier it seems to lighten a woman’s load
primigravida
in multipara, lightening is
not predictable
is a painless, irregular rhythm, infrequent, and cervix does not progress
false labor/braxton hicks
it is painful, rhythmic, frequent, cervix thins and dilates
true labor
Towards end of pregnancy, ___ of a woman’s blood supply is circulating through uterus at any given time
1/6
Pre-pregnancy blood flow
15 to 20 mL/min
during rregnancy blood flow increases to
500 to 750 mL/min, with 75% going to placenta
one finger of an examiner is placed in vaginaother hand on abdomen
bimanual pelvic exam
tenacious coating of mucus plug seals out bacteria during pregnancy
helps prevent infection in fetus and membranes
operculum
these makes the cervix swollen and softer during pregnancy
estrogen and progesterone
towards labor, what happens to cervix
decreases in length and opens
vaginal mucosa becomes dark-bluish red & congested
chadwick’s sign
during labor, vagina becomes hypertrophic and enriched with
glycogen
increased estrogen & progesterone sends negative feedback to anterior pituitary to halt production of
FSH & LH
main source of progesterone until 8 wks & is completely obliterated by 20 wks
corpus luteum
is produced at the end of pregnancy
colostrum