It is well known that buffaloes have seasonal anoestrus and the use of melatonin reduces effects season in reproduction, articularly among sheep goats. This study evaluates on water to increase pregnancy rates a fixed-time insemination programme. The was conducted an Argentinian buffalo herd, located Corrientes Province, during unfavourable reproductive season. Artificial cycles were performed ...

Female reproduction is the only system subjected to well defined periodic changes. The final stage of the menstrual cycle in mammals is the maturation of the ovum and the preparation of the female organism to support fetal development fertilization. Once pregnancy occurs, both maternal and fetal sites emit regulatory signals to ensure embryo development and maternal protection against a graft v...