Case report: two successful pregnancies following the transfer of re-vitrified human day 7 blastocysts developed from vitrified cleaved embryos.
OBJECTIVE
To report successful pregnancies after the transfer of re-vitrified human day 7 blastocysts developed from vitrified cleaved embryos.


RESULTS
A total of five day 7 blastocysts developed from vitrified cleaved embryos were re-vitrified and re-warmed. All of five re-vitrified day 7 blastocysts (100%) survived after warming and were transferred to three patients. Two of the women became clinically pregnant. Of these women, one woman delivered a healthy baby and the other pregnancy is ongoing at 26 weeks of gestation.


CONCLUSIONS
This is the first report of successful pregnancies after the transfer of re-vitrified human day 7 blastocysts developed from vitrified cleaved embryos.
Hiraoka
Kenichiro
K
Kinutani Women's Clinic, 8-23-4F, Hondori, Naka-ku, Hiroshima 730-0035, Japan. hiraoka@chive.ocn.ne.jp
Fujimoto
Yumi
Y
Tateaki
Yuko
Y
Hiraoka
Kaori
K
Horiuchi
Toshitaka
T
Okano
Shinichiro
S
Kinutani
Masayuki
M
Kinutani
Kazuo
K
D001755:Blastocyst / Q000166:cytology*; D015925:Cryopreservation; D046149:Embryo Culture Techniques; D004624:Embryo Transfer / Q000379:methods*; D005260:Female; D006801:Humans; D011247:Pregnancy; D011256:Pregnancy Outcome