Abstract
The implementation of assisted reproductive technologies (ART), hormonal stimulation in particular, may change the quality of ovulated oocytes. The purpose of our work was to study ovulation in CD1 mice after their stimulation with human chorionic gonadotropin (hCG) and to investigate the effects of such hormonal stimulation on the pregnancy duration, fetal losses and the weight of the offspring. No significant differences were found in the total number of ovulated oocytes or in the number of immature (without a polar body) ovulated oocytes; nor were there differences between the groups in the number of oocytes with a developing polar body. However, the number of matured oocytes with a distinct polar body was significantly higher (p < 0.05) in mice stimulated with hCG (experimental group) as compared with the controls (6.2 ± 0.86 and 2.2 ± 0.97, respectively). No significant differences were observed between the experimental and control mice in the duration of pregnancy or in the numbers of term offspring, including the percentage of live and stillborn pups. However, the body weight of the offspring in the experimental group was significantly lower (p < 0.001) as compared with the controls on the fifth day after birth (3.16 ± 0.09 and 3.76 ± 0.07, respectively). Thus, exogenous hCG facilitates the development of mouse oocytes in vivo, which leads to the larger number of their mature forms at ovulation, however, the offspring born after hCG-stimulated pregnancy was characterized by a lower body weight on the fifth day after birth.
Highlights
The implementation of assisted reproductive technologies (ART), hormonal stimulation in particular, may change the quality of ovulated oocytes
No significant differences were found in the total number of ovulated oocytes or in the number of immature ovulated oocytes; nor were there differences between the groups in the number of oocytes with a developing polar body
The number of matured oocytes with a distinct polar body was significantly higher ( p < 0.05) in mice stimulated with human chorionic gonadotropin (hCG) as compared with the controls (6.2 ± 0.86 and 2.2 ± 0.97, respectively)
Summary
Целью исследования было изучен ие характера овуляции у мышей линии CD1 после воздействия на самок хорионическим гонадотропином человека (ХГЧ) и исследование последствий этого воздействия на длительность беременности, эмбриональные потери и вес рожденных потомков. Число же ооцитов с полярным телом у мышей экспериментальной группы после гормональной стимуляции овуляции препаратом ХГЧ было достоверно больше ( p < 0.05) по сравнению с контрольной группой (6.2 ± 0.86 и 2.2 ± 0.9 соответственно). Введение экзогенного ХГЧ самкам мышей стимулирует развитие ооцитов in vivo, что приводит к формированию большего числа их зрелых форм, но потомки, рожденные самками, стимулированными препаратом ХГЧ, имеют меньший вес тела в первые дни после рождения. Для цитирования: Амстиславский С.Я., Раннева С.В., Рагаева Д.С., Чуйко Э.А., Попкова А.М., Брусенцев Е.Ю.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
