Women planned to undergo blastocyst-stage embryo transfer after IVF/ICSI were randomized into 2 groups: * group I: women who had only good-quality embryo transfer. * group II: women who had both good-quality and poor-quality embryo transfer. primary outcome was ongoing clinical pregnancy rate
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
SINGLE
Enrollment
627
Transfer of different qualities of embryos at blastocyst stage
Ongoing clinical pregnancy rate
viable intrauterine pregnancy ongoing beyond 12 weeks of gestation
Time frame: 12 weeks
Biochemical pregnancy rate
positive serum hCG
Time frame: 2 weeks after ET
Clinical pregnancy rate
sonographic detection of viable intrauterine gestational sac
Time frame: 4 weeks after ET
Multiple pregnancy rate
No. of intrauterine gestational sacs
Time frame: 4-6 weeks after ET
Ectopic pregnancy rate
Extrauterine pregnancy
Time frame: 6 weeks after ET
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