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Association between reproductive behaviour and androgen metabolite excretion in free-ranging male giraffes (Giraffa camelopardalis)

Little is known on the giraffe’s reproductive behaviour, particularly observations of male sexual behaviour are scarce. Most information results from studies on captive animals, and observations of free-ranging giraffes were mainly focused on social structure within herds and only yield limited data on the bulls‘ tendency of roaming between cows’ herds. In addition, no data was available on endocrine mechanisms which modulate male reproductive behaviour. Male endocrinology in terms of androgens has only been studied on culled animals, hence no

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Ovarian and placental morphology and endocrine functions in the pregnant giraffe (Giraffa camelopardalis)

Gross, histological and immunocytochemical examinations carried out on maternal and fetal reproductive tissues from two pregnant giraffes at an estimated 8 and 13.5 months of gestation (term=15 months) revealed a typically ruminant macrocotyledonary placenta with binucleate trophoblast cells scattered sparsely in the placentome where they stained intensely with a prolactin antiserum. Binucleate cells were present in greater numbers in the intercotyledonary allantochorion where they did not stain for prolactin whereas the uninucleate trophoblast still did. A single large corpus luteum

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