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Am J Obstet Gynecol. 2016 Jan;214(1):96.e1-8. doi: 10.1016/j.ajog.2015.08.009. Epub 2015 Aug 8.

Minimal stimulation IVF vs conventional IVF: a randomized controlled trial.

Author information

1
Department of Reproductive Endocrinology and Infertility, New Hope Fertility Center, New York, NY. Electronic address: johnzhang98@yahoo.com.
2
Department of Obstetrics and Gynecology, Division of Reproductive Biology, New York University School of Medicine, New York, NY.
3
Department of Reproductive Endocrinology and Infertility, New Hope Fertility Center, New York, NY.
4
Center for Reproductive Medicine, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands.

Abstract

BACKGROUND:

Minimal stimulation in vitro fertilization (mini-in vitro fertilization) is an alternative in vitro fertilization treatment protocol that may reduce ovarian hyperstimulation syndrome, multiple pregnancy rates, and cost while retaining high live birth rates.

OBJECTIVE:

We performed a randomized noninferiority controlled trial with a prespecified border of 10% that compared 1 cycle of mini-in vitro fertilization with single embryo transfer with 1 cycle of conventional in vitro fertilization with double embryo transfer.

STUDY DESIGN:

Five hundred sixty-four infertile women (<39 years old) who were undergoing their first in vitro fertilization cycle were allocated randomly to either mini-in vitro fertilization or conventional in vitro fertilization. The primary outcome was cumulative live birth rate per woman over a 6-month period. Secondary outcomes included ovarian hyperstimulation syndrome, multiple pregnancy rates, and gonadotropin use. The primary outcome was cumulative live birth per randomized woman within a time horizon of 6 months.

RESULTS:

Five hundred sixty-four couples were assigned randomly between February 2009 and August 2013 with 285 couples allocated to mini-in vitro fertilization and 279 couples allocated to conventional in vitro fertilization. The cumulative live birth rate was 49% (140/285) for mini-in vitro fertilization and 63% (176/279) for conventional in vitro fertilization (relative risk, 0.76; 95% confidence interval, 0.64-0.89). There were no cases of ovarian hyperstimulation syndrome after mini-in vitro fertilization compared with 16 moderate/severe ovarian hyperstimulation syndrome cases (5.7%) after conventional in vitro fertilization. The multiple pregnancy rates were 6.4% in mini-in vitro fertilization compared with 32% in conventional in vitro fertilization (relative risk, 0.25; 95% confidence interval, 0.14-0.46). Gonadotropin consumption was significantly lower with mini-in vitro fertilization compared with conventional in vitro fertilization (459 ± 131 vs 2079 ± 389 IU; P < .0001).

CONCLUSION:

Compared with conventional in vitro fertilization with double embryo transfer, mini-in vitro fertilization with single embryo transfer lowers live birth rates, completely eliminates ovarian hyperstimulation syndrome, reduces multiple pregnancy rates, and reduces gonadotropin consumption.

KEYWORDS:

IVF; OHSS; clomiphene citrate; mini-IVF; multiple pregnancy

PMID:
26259908
DOI:
10.1016/j.ajog.2015.08.009
[Indexed for MEDLINE]

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