NUR 360 - Exam 1 Flashcards
serousal layer
outer layer of uterus
myometrium
middle layer made of smooth muscle - responsible for contracting during labor
endometrium
inner mucus layer
fundus
top of uterus where contractions start
isthmus
lower uterine part just above cervix
where is the site for c-section?
isthmus
what does it mean for the cervix to “efface”?
thins and shortens
what hormones do the ovaries produce?
estrogen
progesterone
testosterone
what hormones are the ovaries sensitive to?
FSH + LH
what is the role of estrogen in the cycle?
thickening of endometrial mucosa
when is estrogen the highest?
follicular phase
what 4 supplies does estrogen supply to the uterus?
glycogen, amino acids, electrolytes, and h2o
what hormone does estrogen inhibit?
FSH
what hormones does estrogen stimulate?
LH
what is the role of progesterone in the cycle?
vaginal epithelium grows and cervical mucous becomes thick
what is the effect of progesterone on the breasts?
glandular tissues increases in size and complexity
prep for lactation
what does progesterone do during ovulation and secretory phase?
increase body temp
what hormone does a fertilized egg produce?
hCG
how long is the corpus luteum producing progesterone?
until week 10 of pregnancy
what is the role of progesterone during pregnancy?
maintain lining of uterus until placenta is mature
what hormone supresses uterine contractions?
progesterone
what hormone supresses the maternal immunologic response to reject pregnancy?
progesterone
what makes cervical mucus?
bartholin gland
normal cervical mucus pH
4-5
ovulation mucus pH
7.5
how long is the ova viable?
6-24 hours
when is the sperm most healthy?
first 24 hours
what do fallopian tube enzymes do?
remove protective coating from sperm
what is the acromosomal reaction?
when sperm comes in contact with ovum
how do sperm get to the ovum?
sperm enzymes penetrate layers of the ovum
what is the endometrium called during pregnancy?
decidua
how is the decidua maintained?
estrogen, progesterone, and hCG
what can increase the chance of having twins?
increased maternal age, infertility treatment, first 3mo of marriage, more babies one has,
what can decrease the chance of having twins?
winter/spring in norhtern hemisphere and malnutrition
mono chorionic-diamniotic
- most common
- one chorion, two amniotic sacs
dichorionic-diamniotic
- 25% chance
- two chorions, two amnionic sacs
monochorionic-monoamniotic
- FATAL
- one chorion, one amniotic sac
when does implantation spotting occur?
7-10 days after fetilization
amnion
innermost embryonic membrane
chorion
outermost embryonic membrane
chorionic villi
finger like projections that delivery o2 and nutrients to fetus - used for prenatal testing
what is hCG doing in early pregnancy?
doubles every 48h until 10 weeks
what is hCG effect on hormones?
- stimulates estrogen and progesterone
- prevents ovulation and menstruation during pregnancy
immunologic capabilites of hCG
stops body from rejecting pregnancy
role of hCG in male fetuses
stimulates testosterone and develops genitals
what are the 8 roles of amniotic fluid?
- cushion
- control embryo temp.
- support symmetrical growth
- prevent embryo from sticking to amnion
- free movement
- prevent crushing of umbilical cord
- wedge during labor
- tells us if fetus is healthy and maturing
oligohydraminos
too little amnionic fluid
polyhydraminos
too much amniotic fluid
what is the umbilical cord protected by?
whartons jelly
how are blood vessels organized in the umbilical cord?
2 arteries and 1 vein spiral in cord
are there nerves in the umbilical cord?
no
what is a nuchal cord?
umbilical cord around neck
when does the placenta develope?
14 weeks but could start working as early as 11 weeks
what are the cotyledons?
15-20 subdivisions of the placenta that have their own vascular system
when does the placenta start producing hormones?
produces estrogen + progesterone at 11-12weeks
what viruses cross the placenta easily?
HIV, cytomegalovirus, rubella, polio
its harder for bacteria to cross the placenta but which one can?
treponema pallidum (syphillus)
what is the endocrine function of the placenta?
provide glycogen, cholesterol, and fatty acids
what is hPL?
human placental lactogen hormone that stimulates breast growth
what does hPL regulate?
moms glucose, fat, and protein
goodells sign
softening of cervix
chadwicks sign
bluish color of cervix
hegars sign
softening of isthmus
ballottement
fetal movement
what is a qualitiative pregnancy test?
urine test to detect if hCG present
what is a quantitative pregnancy test?
maternal serum test detects how much hCG and 48h doubling
gravida
of pregnancies
nulligravida
never been pregnant
primigravida
first pregnancy
multigravida
2+ pregnancies
para
of pregnancies carried to 20 weeks
what is the edge of viability?
22-25 weeks
term
delivered 37+ weeks
preterm
delivered 20-36 weeks