male reproductive system
female reproductive system
reproductivity
reproductiveness
spermatozoon
sperm
sperm cell
male reproductive gland
spermatozoan
son
jizz
nut
orchis
egg
testicle
bollock
ballock
testis
ball
swimmers
prespermatogonium
autosperm
amphimixis
spermatology
testosterone
spermatogenesis
loins
arrhenotoky
gonocyte
primary sex characteristic
primary sexual characteristic
primary sex character
breeding
testiole
superfecundation
spermatoon
Klinefelter's syndrome
XXY-syndrome
Klinefelter syndrome
swimmer
autoecism
organ of Berlese
hypospermatogenesis
virilism
oligospermia
haplodiploidy
spermarche
gonocyst
arrhenogeny
female internal reproductive organ