Clinical pregnancy (CP) and live birth (LB) increase significantly with each additional fertilized oocyte up to 9 and CP and LB decline after that: an analysis of 15,803 first fresh in vitro fertilization (IVF) cycles from the SART registry

Article In Press

0
0

Authors:

Stephanie Smeltzer, M.D., Kelly Acharya, M.D., Tracy Truong, M.S., Carl Pieper, Ph.D., Suheil Muasher, M.D.

Abstract:

Objective

To study the association between the total number of fertilized oocytes available and pregnancy outcomes in first fresh IVF cycles with a single blastocyst transfer.

Design

Retrospective cohort study.

Setting

Not applicable.

Patient(s)

A total of 15,803 patients from SART reporting fertility clinics.

Intervention(s)

None.

Main Outcome Measure(s)

Primary outcomes were clinical pregnancy (CP), live birth (LB), and miscarriage rates. Logistic regression was used to investigate the association between the number of fertilized eggs and each outcome.

Result(s)

The median number of total oocytes was 15, and the median number of fertilized oocytes was nine. The odds of a clinical pregnancy were 8% higher for each additional fertilized oocyte up to nine (odds ratio [OR] 1.08; 95% confidence interval [CI] 1.07–1.10) and declined by 9% for every additional fertilized oocyte after nine (OR 0.91; 95% CI 0.89–0.94). Similarly, the odds of an LB was 8% higher for every additional fertilized oocyte up to none (OR 1.08; 95% CI 1.06–1.10) and declined by 8% for every additional fertilized oocyte over nine (OR 0.92; 95% CI 0.90–0.94).

Conclusion(s)

Odds of pregnancy outcomes (CP, LB) increase significantly with every additional fertilized oocyte up to nine, and CP and LB decline after that in first fresh autologous cycles with a single blastocyst transfer.


Read the full text here.

Medium untitled 1

Fertility and Sterility

Editorial Office, American Society for Reproductive Medicine

Fertility and Sterility® is an international journal for obstetricians, gynecologists, reproductive endocrinologists, urologists, basic scientists and others who treat and investigate problems of infertility and human reproductive disorders. The journal publishes juried original scientific articles in clinical and laboratory research relevant to reproductive endocrinology, urology, andrology, physiology, immunology, genetics, contraception, and menopause. Fertility and Sterility® encourages and supports meaningful basic and clinical research, and facilitates and promotes excellence in professional education, in the field of reproductive medicine.

No comments yet.