Gender dysphoria affects 0.5% of people worldwide. Transgender men display a divergence between the female genetic sex and the gender male identity. To the best of our knowledge, we describe the first case report with regard to a transgender man with a dichorionic diamniotic twin pregnancy obtained by artificial insemination using donor sperm as a monoparental family, presenting early fetal growth restriction of both twins. The patient is a 35-year-old transgender man who had previously received gender-affirming hormone therapy based on testosterone for five years and had a prior bilateral mastectomy as gender-affirming surgery. Whether assisted reproductive techniques have any influence on obstetrical outcomes among these patients and whether prior long-term intake of gender-affirming hormone therapy has an impact on pregnancy and obstetrical outcomes remain to be elucidated.

La restricción de crecimiento fetal (RCF) es el término con el que se define a aquellos fetos que no alcanzan el potencial de crecimiento intraútero esperado debido a factores genéticos o ambientales. Dentro de las causas de RCF asociadas a la placenta encontramos mosaicismo confinado a la misma, enfermedad isquémica placentaria y anomalías estructurales a este nivel. Se presenta el caso de una paciente de 32 años con diagnóstico de RCF que asocia múltiples quistes econegativos subamnióticos en la cara fetal de la placenta. Se finaliza la gestación en semana 34 mediante cesárea electiva por ausencia de diástole en el estudio Doppler de la arteria umbilical, evidenciando cinco quistes subamnióticos de 4 a 6 cm que alteran la superficie del amnios.