The Founding Papers · FP·08 · 1984
1984: Two more pregnancies from frozen embryos
G. H. Zeilmaker and his colleagues reported two pregnancies from embryos that had been frozen whole and thawed.
The story
Within a year of the Melbourne report, a second team showed that frozen embryos could start pregnancies.
Their short paper is one of the steps by which embryo freezing moved from a single laboratory to clinics around the world. Today frozen embryo transfer is a routine part of IVF.
The paper
Two Pregnancies following Transfer of Intact Frozen-Thawed Embryos
G. H. Zeilmaker, A. T. Alberda, I. van Gent, C. M. Rijkmans, A. C. Drogendijk
Fertility and Sterility 1984;42(2):293 to 296. August 1984. Read the paper.
How we know
Citation from PubMed and Europe PMC, read 6 October 2026. No abstract is indexed and the journal could not be opened, so this label rests on the title.
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