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Related Experiment Videos

Sex ratio in triplets

N Mordel1, S Mor-Yosef, A Simon

  • 1Department of Obstetrics and Gynecology, Herbrew University Hadassah Medical Center.

Journal of Perinatal Medicine
|January 1, 1995
PubMed
Summary
This summary is machine-generated.

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Ovulation induction treatments significantly alter triplet pregnancy sex ratios, decreasing same-gender sets. Menotropins yield more male triplets than clomiphene, impacting overall sex distribution in multiple births.

Area of Science:

  • Reproductive Endocrinology
  • Human Genetics
  • Maternal-Fetal Medicine

Background:

  • Triplet pregnancies have increased due to ovulation induction therapies.
  • The sex ratio and gender composition within triplet sets are not fully understood.

Purpose of the Study:

  • To investigate the sex ratio and proportion of same-gender triplets.
  • To compare these ratios across spontaneous and induced ovulation groups.

Main Methods:

  • Analysis of 36 triplet deliveries from one hospital and 2717 from published literature.
  • Comparison of sex ratios (male/female) and homogenous gender set ratios.

Main Results:

  • Triplet sets of the same gender comprised 33% of all cases.

Related Experiment Videos

  • Sex ratios varied: spontaneous (2.00), menotropin (1.57), and clomiphene (0.94).
  • Ovulation induction correlated with a decline in same-gender triplet sets.

    • Conclusions:

    • Sex ratio in triplets differs based on ovulation induction method.
    • Ovulation induction reduces the proportion of same-gender triplet sets.
    • Menotropins result in a higher male triplet proportion compared to clomiphene.