infertility Flashcards
how many couples are affected by infertility
1 in 6
what is the definition of infertility
failure to achieve a clinical pregnancy after 12 months or more of regular unprotected sex in a couple who have never conceived a child
what is the role of sertoli cells
secrete seminiferous fluid, androgen binding globulin , inhibin and activin hormones
create blood testes barrier
provide nutrients
destroy defective sperm
remove excess cytoplasm from seminiferous tubules
what is the role of androgen binding globulin
for sperm production - binds testosterone
role of inhibin and activin
regulation of FSH secretion adn control of spermatogenesis
where does spermatogenesis occur
inside seminferous tubules
where are sperm stored
epidydmis
what does seminal vesicle do
releases fluid containing
fructose
pg’s (make vag contract)
fibrinogens
how often is GnRh released from hypothalamus
every 2-3 hrs not cyclical like females
what does Lh stimulate in males
testosterone release from leydig cells
surges of what hormones stimulate spermatogenesis
testosterone and FSH
give examples of obstructive male inferitility and endocrine features expected
CF - no vas deferens
norm LH, FSH and testosterone
when do the make testes usually descend
6-9 months
what does globozoospermia mean
sperm have rounded head and no acrosome
what would endocrine features of non-obstructive infertility be
high LH and FSH low testosterone
