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Comparative Study
. 1994 May;61(5):970-1.
doi: 10.1016/s0015-0282(16)56715-6.

A comparison of in vitro fertilization results after embryo transfer after 2, 3, and 4 days of embryo culture

G J Huisman  1 , A T Alberda, R A Leerentveld, A Verhoeff, G H Zeilmaker
Affiliations
Free article
Comparative Study

A comparison of in vitro fertilization results after embryo transfer after 2, 3, and 4 days of embryo culture

G J Huisman et al. Fertil Steril. 1994 May.
Free article

Erratum in

  • Fertil Steril 1994 Jul;62(1):210

Abstract

Embryo transfer results after a 2 to 4 day period of embryo culture were compared. Two thousand two hundred ninety-seven ETs, performed in 1991 and 1992, were analyzed. Ongoing pregnancy rates after 2, 3, or 4 days of embryo culture were 23.3%, 21.9%, and 26.4%, respectively. Multiple pregnancy rates were 36.2%, 38.8%, and 32.6% per ongoing pregnancy for the three groups, respectively. The implantation rate of 73 cavitating morulae on day 4 was surprisingly high (41%) compared with that of other developmental stages. Transfer after 4 days of culture gives the ability to recognize embryos with a very high implantation potential.

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