Oestrous behaviour, follicular growth and ovulation during pregnancy in the hare (Lepus europaeus).

Sexual chase was observed throughout pregnancy in hares permanently housed with a male. The incidence of oestrus followed by mating increased rapidly from Day 34 to day 38. Follicular growth was not interrupted; the mean number of large follicles increased at the end of pregnancy. Ovulation could be induced by hCG at any stage of pregnancy, but only on the last days by mating.