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Controlled ovarian hyperstimulation in assisted reproduction: effect on the immune system
A Giuliani1, W Schoell, J Auner
1Department of Obstetrics and Gynecology, University of Graz, Austria. giuliani@balu.kfunigraz.ac.at
Fertility and Sterility
|November 7, 1998
Summary
Controlled ovarian hyperstimulation (COH) in assisted reproduction did not significantly alter the immune system. This study monitored immune cell changes during natural and stimulated cycles, finding no adverse effects from COH.
Area of Science:
- Reproductive immunology
- Assisted reproductive technology
Background:
- Controlled ovarian hyperstimulation (COH) is a key component of assisted reproduction.
- Understanding COH's impact on the maternal immune system is crucial for successful outcomes.
Purpose of the Study:
- To investigate the effects of COH on immune system parameters in women undergoing assisted reproduction.
- To compare immune responses during natural cycles versus cycles with COH and in vitro fertilization (IVF).
Main Methods:
- A prospective, nonrandomized case-control study was conducted in an academic research setting.
- Blood samples were analyzed for lymphocyte subpopulations and differential blood counts during natural and COH/IVF cycles.
- Key time points included follicular, ovulatory, and luteal phases.
Main Results:
- Natural cycles showed increased lymphocytes and decreased T helper/T suppressor ratio in the late follicular phase.
- COH cycles exhibited transient increases in leukocytes and neutrophils around hCG administration and oocyte retrieval.
- Immune cell counts also increased during the luteal phase in hyperstimulated cycles.
Conclusions:
- COH using hMG and a GnRH antagonist did not appear to negatively impact the overall immune system.
- The observed immune changes during COH cycles were transient and within normal physiological variations.