bio pregnancy
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34 Terms
fertilization
when sperm meets the egg and forms a zygote
how many chromosomes in a zygote
46; 23 pairs with one from each parent
xy chromosomes are
male
xx chromosomes are
female
testes
this is where sperm production occurs
epididymis
stores the sperm and where it leaves
vas deferens
takes sperm out of tests and into the penis
vasectomy
the knotting and cutting of the vas deferent
ovaries
where egg production and sex hormones are produced
what are female sex hormones?
estrogen
can males produce estrogen
yes
how many eggs does a fetus have
7 million
how many eggs does a new born have
1 million
how many eggs to females have at puberty
300,000 eggs
how many eggs do women have at menopause
zero eggs
what percent of released eggs have chromosomal abnormalities
20%
how many eggs are released from the ovaries in a life time
500
fallopian tubes
release 1 egg per month
fallopian tubes are NOT physically connected to the ovaries
ectopic pregnancy
if the eggs don’t make it into the fallopian and implant somewhere in the gap; very dangerous for the mother
uterus
hollow muscular organ that nourishes the fertilized egg
cervix
the outlet to the uterus where the baby comes out; dilates to enable childbirth
hCG promotes…
continued hormone release and uterus build up
human chorionic gonadotrophin
produced by embryo and the placenta after implantation
how long does egg implantation take
8 days
detection occurs in blood after
2-3 days after implantation
detection in urine occurs
3-4 days after implantation
labor occurs within
15 days of the due date
what triggers contractions?
prostaglandins
“water breaks”
the amnionic sac ruptures
the baby’s head emerging is also known as
crowning
how common is infertility in the US
1 out of 7 couples
what is released during afterbirth
the placenta is released about 30 minutes later
the pill/hormone ring
tricks ur body into thinking it’s pregnant so ovulation doesn’t occur and thus u cannot drop any eggs to get fertilized