Gynaecology & Obstetrics Monochorionic monoamniotic twins occur when splitting of zygote occurs: A At bilaminar germ disc stage B At 8 cell stage C At 2 cell stage D At early blastocyst stage 💡 Explanation Monochorionic monoamniotic twins occur when splitting of zygote occurs: ✓ Correct Answer: D. At early blastocyst stage