Gonadotropins do not induce antiphospholipid antibodies

Area of Science:

• Reproductive Endocrinology
• Immunology
• Assisted Reproductive Technology

Background:

• Women undergoing assisted reproduction often exhibit a higher incidence of antiphospholipid antibodies (APAs).
• Superovulation with gonadotropins is a key component of assisted reproduction protocols.
• The potential link between gonadotropin stimulation and APA induction requires investigation.

Purpose of the Study:

• To investigate whether gonadotropin-induced superovulation in assisted reproduction leads to an increased incidence of antiphospholipid antibodies (APAs).
• To determine if women undergoing assisted reproduction are predisposed to abnormal immune responses, specifically APA development, due to ovarian stimulation.

Main Methods:

• Prospective study comparing three groups of women: first-time assisted reproduction patients undergoing gonadotropin stimulation (group 1), patients with prior gonadotropin stimulation (group 2), and normal fertile controls (group 3).
• Serum samples were collected before, during, and after the stimulation cycle for group 1.
• Enzyme-linked immunosorbent assay (ELISA) was used to detect antiphospholipid antibodies.

Main Results:

• Antiphospholipid antibodies (APAs) were detected in 20% of women in group 1 and 24% in group 2.
• APA incidence in both treatment groups was significantly higher than in the normal fertile control group (2%).
• APA positivity in group 1 persisted throughout the treatment cycle, and there was no significant difference in APA rates between group 1 and group 2.

Conclusions:

• Gonadotropin administration and the subsequent ovarian response do not appear to induce antiphospholipid antibodies (APAs).
• The elevated prevalence of APAs observed in women undergoing assisted reproduction is not attributable to events within the stimulation cycle.
• Further research is needed to elucidate the underlying causes for the higher APA incidence in this population.