Nurs 353 test 1 Flashcards
Skene glands
on either side of the urethra and produces mucus that helps lubricate the vagina
bartholin glands
for lubrication and produces acidic environment for sperm to travel up
no estrogen =
menopause
when a girl is young estrogen helps
create opening, pubic hair, and ovarian functioning
cervix
bottom of the uterus. not its own organ
what holds everything together
ligaments
are the Fallopian tubes actually attached?
no just ligaments holding together and little fingers grab the egg
internal stuctures
vagina, uterus, cervix, Fallopian tubes, ovaries
external structures
mons pubis, labia majora, labia minora, clitoris, sienne glands, bartholinites glands
rugae
allows vagina to stretch for child birth
peak of estrogen does what to cervix
opens so sperm can fit through
thelarche
occurs around 9-11 years. signals ovarian function has begun. breast buds, higher estrogen, and growth spurt
menarche
first menstruation. usually 1 year after thelarche. average 13 years old
menstruation is controlled by
negative and positive feedback system
first day of bleeding is
day 1 of cycle
menstrual cycle does what to the uterus
prepares it for pregnancy
typical menstrual cycle is 28-32 days but is can range from
21-35 days
4 phases of endometrial cycle
menstrual phase, proliferative phase, secretory phase, and ischemic phase
menstrual phase
vasoconstriction and sloughing of endometrial tissue- bleeding
proliferative phase
ends with ovulation. rapid growth of the endometrium and is restored in 4 days
proliferative phase if dependent on
estrogen
secretory phase
day after ovulation. increasing amounts of progesterone thicken and vascularize the endometrium
ischemic phase
does not occur if you get pregnant. day 27-28. estrogen and progesterone are very low. spiral arteries vasoconstriction and bleeding begins marking day 1 of cycle.
what phase is it when the endometrium reaches full thickness
secretory phase where it is 10-12 mm thick
phase of ovarian cycle
follicular phase, ovulatory phase, and luteal phase
follicular phase
before ovulation 1-30 follicles begin to mature. LH affects a single follicle
the single follicle that is chosen during the follicular phase is called
Graafian follicle
ovulatory phase
estrogen peaks and ends with the release of the egg from the Graafian follicle
where is LH released and what stimulates it
estrogen peaks which stimulates the pituitary gland to release LH around day 12
what do you need to ovulate
LH and estrogen
luteal phase
cells of the follicle form the corpus luteum.
if pregnancy occurs the corpus luteum
continues to release progesterone and estrogen until placenta matures
if no pregnancy occurs the corpus luteum
degenerates and the decreased progesterone signals the beginning of menstruation
what produces hormones to sustain pregnancy
corpus luteum
4 major hormones of the menstrual cycle
follicle stimulating hormone (FSH), luteinizing hormone (LH), estrogen, and progesterone
follicle-stimulating hormone
stimulates the development of Graafian follicles and therefore estrogen
luteinizing hormone
spikes day 12-13 and stimulates the release of the ovum
where is estrogen produced
ovaries
where is progesterone produced
corpus luteum
prostaglandins
oxygenated fatty acids classified as a hormone
if you do not have any prostaglandins then
estrogen cannot peak
what is considered the essential organ of males
testes because they produce sperm
what % of sperm are mobile
40%
how many sperm are there per mL of ejaculate
120 mL
60% of semen volume is produce in _____ and 30% of semen is produced in ______
60% produced by seminal vesicles and 30% produced by prostate
why is the 30% produced in the prostate important
because they are alkaline and it helps protect the sperm from the acidic environment of the vagina
conception occurs when
a sperm nucleus enters the nucleus of the egg
what account for 60% of miscarriages
chromosomal anomalies and the miscarriage usually occurs within the first 8 weeks
once the sperm nucleus and egg nucleus combine what begins
meiosis
conception occurs in the
Fallopian tube
all cells contain ___ chromosomes and how many pairs are inherited from each parent
46 chromosomes and 23 pairs and inherited
mitosis
cell division
3 days after fertilization the zygote has how many cells
16 cells
5 days after fertilization
blastocyst and now enters the uterus
once the blastocyst reaches the uterus us becomes
an embryoblast (embryo) and trophoblast (placenta)
implantation should occur ______ days after ovulation
6-10 days
where does implantation occur
upper portion of the uterus where it gets buried underneath the endometrial surface
most critical time for organ system development
before 8 weeks
when are all the organ systems and external structures present
8 weeks
stage of the embryo
day 15 until 8 weeks after fertilization
amniotic fluid
cushions the fetus and protects against developmental problems
when does amniotic fluid appear
about 3 weeks and increases until about 24 weeks
yolk sac
has nutrients and oxygen for embryo until placenta transfer can occur
when does placenta begin to form and when does the transfer occur
begins to form at implantation and transfer occurs 2-3 weeks gestation
what does the yolk sac become
digestive system
how many arteries and veins does the umbilical cord have
2 arteries and 1 vein
placenta function
passive diffusion to transfer nutrients and oxygen to the fetus and also helps with metabolic function and waste
where does passive diffusion of placenta occur
chorionic villi
when is the placenta complete and how long does it grow for
complete at 8-10 weeks and grows until 20 weeks
can bacteria cross the blood placenta barrier
no most bacteria are too large
vaginal secretions are was ph
4-5 so slightly acidic
bacterial vaginosis
normal hydrogen peroxide producing lactobacilli are replaced with high concentrations of anaerobic bacteria
bacterial vaginosis is associated with
preterm labor
common signs and symptoms of bacterial vaginosis
fishy odor
screening and management of bacterial vaginosis
gram stain slide and treatment is flagyl (antibiotic)
candidiasis
yeast infection
symptoms of candidiasis
itching, vaginal dryness, painful urination, discharge is thick
trichomoniasis
STI that is cause by parasite
trichomoniasis is associated with
preterm delivery
screening for trichomoniasis
saline slide (shows white blood protozoa) and examination
common symptoms of trichomoniasis
most will be asymptomatic but some will have yellowish/green frothy foul smelling discharge, inflammation, painful urination and intercourse
malodorous
foul smelling
management of trichomoniasis
flagyl and male partner should receive treatment
chlamydia is associated with
preterm birth and blindness in the baby
gonorrhea is associate with
miscarriage, preterm birth, low birth weight, infection of fluid that surrounds fetus, blindness of the baby, and premature rupture of the membranes surrounding the fetus
syphilis is associated with
preterm birth, stillbirth, and some deaths after birth. untreated infants tend to develop problems because syphilis may pass from infected mother to fetus
can antibiotics cross the placenta
yes
group B streptococcus
considered normal flora of the vagina and intestines but is a huge factor in neonatal morbidity and mortality
screening and management of group B streptococcus
retrovaginal culture screening at 35-37 weeks and treatment is antibiotic prophylactically for the baby
embryo vs fetus
embryo until 8 weeks and fetus 9 weeks on until born
pregnancy lasts
40 weeks
pregnancy is computed by
nagele’s rule
nagele’s rule
LMP subtract 3 months, add 7 days and 1 year
how long is each trimester
1st - week 1-13
2nd - week 14-26
3rd - week 27-40
viability
refers to capability of the fetus to survive outside the womb
age of viability
about 24 weeks gestation when central nervous system functions and lungs of capable of oxygenation
before 24 weeks the lungs dont have
enough surfactant to breath on their own
when is the fetus less likely to be effected by environmental teratogens
after 9 weeks
4th week vs 5th week of a fetus’s heart
week 4 - 2 chamber heart
week 5 - beating heart
end of week 5 - 4 chamber heart
where does the blood travel in the fetus
it does not need to travel to the lungs so it goes through ductus arteriosus
fetal heart rate is
110-160 beats per minute