A 39-year-old nulliparous woman with a 1 year history of involuntary infertility underwent in vitro fertilisation and fresh single blastocyst transfer ([figure 1][1], inset). Transvaginal ultrasonography on cycle day 51 showed… Click to show full abstract
A 39-year-old nulliparous woman with a 1 year history of involuntary infertility underwent in vitro fertilisation and fresh single blastocyst transfer ([figure 1][1], inset). Transvaginal ultrasonography on cycle day 51 showed a single intrauterine gestational sac with fetal pole. The crown-rump
               
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