Reproductive performance of gilts and weaned sows grouped at different days after insemination.

The objective of the study was to compare the reproductive performances of gilts and weaned sows grouped at different days after insemination. The study was conducted on a sow farm in the Midwest of Paraná State, Brazil, using animals from the Camborough genetic line (PIC®, Patos de Minas, Brazil, Landrace × Large White crossbred). The groups of comparison have considered the distribution of gilts (n = 407) and sows (parity 1 to 5; n = 843) according to the day of group housing in collective pens in relation to the day of last insemination (AI).

Effects of flush feeding strategy before breeding on reproductive performance of modern replacement gilts: impacts on ovulation rate and litter traits.

AbstractThe effects of two feed levels offered during two estrous cycles before insemination were evaluated on the reproductive performance of gilts. A total of 93 gilts (PIC Hendersonville, TN) were individually housed and manually fed twice a day with 2.1 or 3.

Impact of feed intake in early gestation on maternal growth and litter size according to body reserves at weaning of young parity sows.

The effect of increasing the feed level (1.8, 2.5, and 3.

Maternal nutrition during early and late gestation in gilts and sows under commercial conditions: impacts on maternal growth and litter traits1.

The effects of two different feeding levels, offered in two phases during gestation, on body measurements and litter traits were evaluated in 152 gilts and 551 sows. The treatments consisted of the combination of two gestation phases (phase 1-days 22 to 42; phase 2-days 90 to 110) and two feed amounts (1.8 or 3.

Effects of intravaginal devices containing different dosages of medroxyprogesterone acetate for the control of the estrous cycle in gilts.

This aim of this study was to investigate the effectiveness of intravaginal devices (IVDs), containing medroxyprogesterone acetate (MPA), for controlling the estrous cycle in pubertal gilts. Gilts were assigned to four treatments: Control (no IVD); IVD containing 100 (IVD100), 200 (IVD200) or 400 mg (IVD400) of MPA. The IVDs were inserted on day 12 of the estrous cycle and maintained intra-vaginally for 14 days.

Impact of feed intake during late gestation on piglet birth weight and reproductive performance: a dose-response study performed in gilts.

The effects of increasing feed intake (1.8, 2.3, 2.

Two different feeding levels during late gestation in gilts and sows under commercial conditions: impact on piglet birth weight and female reproductive performance.

The increase in the litter size in past decades has caused reduction in the individual piglet birth weight. Therefore, nutritional strategies employed in the last third of gestation in order to improve the piglet birth weight have been studied. This study aimed to evaluate the effects of 2 different feeding levels (1.