A case of oocyte and embryo vitrification resulting in clinical pregnancy

Objective To examine a case of clinical pregnancy following oocyte and day 3 embryo vitrification. Design Case report. Setting Huntington Centro de Medicina Reprodutiva, a private infertility clinic, in São Paolo, Brazil. Patient(s) A 31-year-old woman, gravida 1, para 1, with polycystic ovary syndrome. Intervention(s) In vitro fertilization with oocyte and embryo vitrification. Main Outcome Measure(s) Clinical pregnancy defined as fetal cardiac activity on ultrasound examination. Result(s) Transvaginal ultrasound examination, at 7 6/7 weeks, revealed a single live intrauterine pregnancy with positive cardiac activity. Conclusion(s) Although further research is needed, this case suggests that repeat vitrification and warming of oocytes and embryos not only are possible but can result in pregnancy.