Complex sentence: Off Portugal, the young seem to be born in May and December following a gestation period of over a year; as they near parturition the females undergo ovarian atresia (regression of the follicles), suggesting that they enter a resting period afterwards.
Split into simpler sentences: Off Portugal, the young seem to be born in May and December following a gestation period of over a year. As they near giving birth, the females undergo ovarian atresia (regression of the follicles), suggesting that they enter a resting period afterwards.