The oestrous cycle in pigs spans a period of 18–24 days. It consists of a follicular phase of 5–
7 days and a luteal phase of 13–15 days. During the follicular phase, small antral follicles …

Ovaries were collected from Dutch Landrace crossbred pigs ranging in age from 49 days
postcoitum to 90 days after birth to quantify ovarian follicular development. Morphological …

This chapter discusses the sexual development, maturation, and other factors and issues
related to reproduction in pigs. Serum testosterone concentrations are low during the later …

Gonadotropins determine the follicle selection and ovulation rate. Follicle growth is
independent of gonadotropins until antrum formation, at which time recruitment occurs. Once …

Recent advances in research on seasonal infertility are discussed with a special focus on
implications of the generally recommended restricted post-mating feeding strategy of the …

The domestic pig is not a true seasonal breeder but manifests variations in reproductive
performance throughout the year. For instance, the weaning-to-oestrus interval is longer in …

Effects of nutrition on age at puberty, return to oestrus after weaning, ovulation rate and
embryo survival have been observed in the pig. Nutrition may influence reproduction at the …

In the wild pig mating activity is seasonal. The main breeding period is in late autumn but a
second period may occur around April. It is known from other species that seasonal …

Within 14h of ovulation, follicular development in gilts was skewed towards a majority of
mature follicles, based on their endocrine milieu. Oocyte maturation was also skewed, with a …

In female pigs, undernutrition may influence growth of antral follicles from various size
classes, decrease ovulation rate, delay puberty and return to oestrus after weaning. It could …