Influence of heat stress and nighttime recovery on ovarian follicle population, oocyte yield, and in vitro embryo production in Holstein heifers

Archives animal breeding/Archiv für Tierzucht 2026 Open access

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Authors: Muhammed Furkan Çiftçi, Ömer Faruk Yeşilkaya, Maide Gölbaşı, Ayşe Sarı, Sakine Ülküm Cizmeci, Dursun Ali Dínç
DOI: 10.5194/aab-69-301-2026
Cited by: 1
References: 46

Abstract

The objective of this study was to evaluate the effects of heat stress and nighttime temperature drop on oocyte yield and in vitro embryo production (IVEP) success. The study was conducted on Holstein heifers within the same herd, under similar management and feeding conditions. Each session of ovum pick-up (OPU) was classified into continuous heat stress (CHS; THImax ≥72 and THImean ≥68), high daytime temperature–humidity index (THI) with nighttime recovery (HDT-NR; THImax ≥72 and THImean

Fields of Study & Subjects

Effects of Environmental Stressors on Livestock Reproductive Physiology in Livestock Reproductive Biology and Fertility

Publication details

Journal / source
Archives animal breeding/Archiv für Tierzucht
Publisher
Copernicus GmbH
Volume
69
Issue
2
Pages
301–308
Publication date
19 May 2026
Language
EN