Lipid profile of in vitro embryos produced from Bos indicus cows with low and high antral follicle counts

Rosa, Cássia Inês Lourenzi Franco; Costa, Ciniro; Lima, Camila Bruna de; Silva, Camila Bizarro da; Zangirólamo, Amanda Fonseca; Ferreira, Christina R.; Seneda, Marcelo Marcondes

doi:10.1016/j.livsci.2021.104586

Livestock Science

2021

DOI: 10.1016/j.livsci.2021.104586

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Lipid profile of in vitro embryos produced from Bos indicus cows with low and high antral follicle counts

Cássia Inês Lourenzi Franco Rosa

Ciniro Costa

Camila Bruna de Lima

et al.

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Cited by 2 publications

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“…Another possible reason why high-AFC cattle produce higher-quality embryos is because of changes in lipid content. Nelore cows with high AFC had greater concentrations of triglyceride and lower cholesterol and diacylglycerol concentrations in their embryos compared with embryos from low-AFC cattle ( Rosa et al, 2021 ). Elevated triglyceride and reduced diacylglycerol concentrations are prominent in grade 1 bovine embryos ( Janati Idrissi et al, 2021 ).…”

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Associations of antral follicle count with fertility in cattle: A review

2023

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Graphical Abstract Summary: Ultrasonic determination of antral follicle count (AFC) is used to classify animals into high or low AFC categories. These categories have a wide range and animals classified as low on one study may be considered high by another study based on the population. Associations with high AFC cows include greater follicular vasculature, blastocyst rates, hatched blastocyst rates, 12-d embryonic cell growth and cleavage rates, along with a lower number of embryonic apoptotic cells. More high AFC cows cycled as heifers at 15 months, had a greater pregnancy rate and conception rate and progesterone concentration after breeding, and fewer days to conception. However, other studies have found that low AFC animals had greater pregnancy and conception rates and progesterone concentration after breeding compared with high AFC cows. Low AFC cows also showed greater preovulatory follicle blood flow, greater blastocyst cell number, and greater area of the corpus luteum.

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Associations of antral follicle count with fertility in cattle: A review

2023

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Impact of antral follicle count on follicular–luteal characteristics, superovulatory response, and embryo quality in Sahiwal cows

Gawai,

Kumar,

Mehrotra

et al. 2024

Front. Vet. Sci.

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The study aimed to evaluate the effect of antral follicle count (AFC) on follicular and luteal development during the estrous cycle and superovulatory period, as well as on superovulatory response and in vivo embryo quality within the MOET program. A total of 48 estrus-induced (500 μg PGF2α, Single dose, IM) Sahiwal cows (Bos indicus) with a BCS between 3.5 and 4.0 were selected for the study. On the day of wave emergence, the animals were divided into two groups based on the AFC, i.e., low AFC (≤18) and high AFC (>18). Both the groups were monitored daily using B-mode ultrasonography (USG) for one cycle, and the superovulation protocol was initiated on the 9th day of the subsequent estrous cycle. A total of 240 μg of FSH in eight divided doses were given in a tapering sequence for 4 days and simultaneous administration of 500 μg PGF2α, along with the fifth dose of FSH. Donors were inseminated at superovulatory estrus using double straws of high-quality frozen semen thrice at 12-h intervals, and non-surgical flushing was performed on day 7 of the superovulatory estrus followed by embryo searching and evaluation under a stereo zoom microscope. Ovulatory waves of the high-AFC Sahiwal cows have significantly (p ≤ 0.05) larger sizes of preovulatory follicles (POF) (12.06 ± 0.19 mm vs 11.56 ± 0.16 mm) and corpus luteum (CL) (19.57 ± 0.28 mm vs 18.26 ± 0.35 mm), as compared to low AFC. The ovarian size was significantly (p < 0.0001) larger in cows with high AFC during the superovulatory protocol. The number of large, medium, and small follicles was significantly (p < 0.0001) high on the day of superovulatory estrus (SOE), PGF2α administration, and initiation of superovulatory protocol, respectively, in high AFC. Donors with high AFC had a notably greater (p < 0.0001) count of CL and embryos retrieved per flushing, including excellent and fair-quality embryos. A strong association (p < 0.0001) between high AFC and ovarian size (r = 0.9136), superovulatory response (r = 0.9350), and embryo quality (x2 = 8.788; p = 0.032) and number (r = 0.9858) were also recorded. Based on these results, AFC is considered a dependable indicator for forecasting reproductive capacity. Bos indicus donors with an average AFC of 30 or higher are recommended.

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Lipid profile of in vitro embryos produced from Bos indicus cows with low and high antral follicle counts

Cited by 2 publications

References 70 publications

Associations of antral follicle count with fertility in cattle: A review

Associations of antral follicle count with fertility in cattle: A review

Impact of antral follicle count on follicular–luteal characteristics, superovulatory response, and embryo quality in Sahiwal cows

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