Publications by authors named "Miguel Pizzolante Bottino"
Article Synopsis
- The study aimed to investigate how maternal heat stress during pregnancy affects the reproductive capabilities and follicle count of dairy calves.
- Conducted in southeastern Brazil, it analyzed data from Holstein cows exposed to heat stress in different trimesters, comparing them to non-exposed cows.
- Results showed that heat stress led to lower reproductive performance, longer calving intervals, and reduced antral follicle counts in their calves, indicating adverse effects on future fertility.
The objective of this study was to verify the causes of the lower response of primiparous Bos indicus cows to the ovulation synchronization protocol. Two experiments were performed to evaluate the biochemical profile, oocyte and follicular cell quality (Experiment 1) and pregnancy (Experiment 2). In Experiment 1, suckled primiparous (n = 24) and multiparous cows (n = 24) were submitted to ovum pick up (OPU).
View Article and Find Full Text PDFOvulation synchronization protocols are well established in beef and dairy cows. However, the protocol response rate is around 70-90%. In beef cows, factors such as inadequate nutrition and calf presence negatively impact the response of progesterone (P4)/estradiol-based ovulation synchronization protocols by interfering with GnRH release and consequently reducing LH pulsatility and final follicular development.
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