A normal baby is possible despite twins following a single embryo transfer even if one twin is genetically defective.

CONCLUSIONS: One should consider all possibilities before suggesting termination of a very desired pregnancy. This woman had also been advised by other specialists in reproductive endocrinology that conception with her own oocytes (as did occur here) was not possible and she should consider donor oocytes based on her marked diminished oocyte reserve. PMID: 29746018 [PubMed - in process]
Source: Clinical and Experimental Obstetrics and Gynecology - Category: OBGYN Tags: Clin Exp Obstet Gynecol Source Type: research