Ninety-six (Finnish Landrace x Dutch Landrace) reproductive sows were used at parities 1, 3, 5, and 7 + 8 from d 107 of gestation to d 21 of lactation to investigate the effects of diet and parity on apparent total tract digestibility (ATTD). Animals were randomly assigned to one of four dietary treatments. Dietary treatments were 1) a P-deficient (1.1 g digestible P [dP]/kg) Dutch semipractica...

ALTHOUGH MANY TOOTHED WHALES (CETACEA: Odontoceti) lactate for 2-3 years or more, it is not known whether milk composition is affected by lactation stage in any odontocete species. We collected 64 pooled milk samples spanning 1-30 months postpartum from three captive bottlenose dolphins Tursiops truncatus. Milks were assayed for water, fat, crude protein (TN × 6.38) and sugar; gross energy was ...

Studies examining hormones throughout pregnancy and lactation in women have been limited to single, or a few repeated, short-term measures of endocrine activity. Furthermore, potential differences in chronic hormonal changes across pregnancy/lactation between first-time and experienced mothers are not well understood, especially as they relate to infant development. Hormone concentrations in ha...

Changes in the mineral composition of mare milk during lactation were studied. Milk samples were obtained from five Thoroughbred mares 0"«^« thr• times weekly from the first to the eighth week of lactation and from two of the mar^ for an additional 8 wk. Samples averaging 500 mL were obtained after oxytoc.n was administered to the mares. Each sample was analyzed for total sohds, ash ca ciuna is...

Considering dairy cattle reproduction, profitability is maximized when every cow gets pregnant at her optimal time after calving (at a low cost). This optimal time of conception has consequences for economically optimal breeding decisions and the value of a pregnancy, both a new pregnancy and a loss of pregnancy (abortion). Some cows are more important to get pregnant than others. This paper di...