Human Reproduction Flashcards
FSH helps in which process
Spermiogenesis
amount of sperms
200-300 million
secretions of accesory ducts imp for
maturtion and motility both
oogonia arrested in
prophase 1
temporarily arrested oogonia c/a?
primary oocyte
change in primary oocyte?
layer of granulosa cells come and this is c/a primary follicle
follicles left at puberty?
60,000-80,000 in each ovary
change in primary follicle?
new granulosa cells and new THECA now c/a secondary follicle
theca in tertiary follicle is organised into?
differentiates into outer theca externa and inner theca interna
what happens inside tertiary follicle?
primary oocyte completes meiotic div , unequal
meiotic div inside tertiary follicle leads to?
haploid secondary oocyte and 1st polar body
secondary oocyte present in?
tertiary follicle
zona pellucida covers?
secondary oocyte
zona pellucida covered sec oocyte present in?
graafian follicle
LH and FSh stimulate?
secretion of estrogen by the growing follicles
fertilisation happens at?
ampullary region or junction of isthmus and ampulla
what happens when sperm enters into ovum?
induces the completion of meiotic div of secondary oocyte
which div in zygote?
mitotic c/a cleavage
cleavage location?
isthmus to uterus travel
result of cleavage?
daughter cells c/a blastomeres
morula has ?
8-16 blastomeres
placenta formed by?
chorionic villi and uterine tissue
hormone in pregnancy not sec by placenta?
relaxin by ovary
how many germ layers give rise to tissues or organs?
all 3
stem cells present in?
inner cell mass
1 month?
embryo heart
end of 2nd month
limbs and ligits
end of 12 weeks/ 1st trimester/ 3 months
major organ systems eg limbs and external genital organs
5th month
first movements, hair on head
end of 24 weeks/ 2nd tri/ 6 months
fine hair, eyelids seperate, eyelashes
signals of parturition originate from?
fully developed foetus and placenta
intensity of contractions initially?
mild
when mammary gland start producing milk?
end of pregnancy
in ovary, where are follicles present?
embedded in stroma
neuroendocrine mechanism involves
cortisol, estrogens, oxytocin
which membrane prevents dessication of embryo
amnion
