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(what happen in puberty 20211130-puberty, how does the male reproductive…
what happen in puberty
period
primary sexual characteristics
puberty
secondary sexual characteristics
how does the male reproductive system work
testicle
scrotum
penis
urtehera
what happen in pregnancy and birth
fertilisation
foetus
embryo
blastocyst
how does the female reproductive system work
uterus
ovary
fallopian tube
vulva
