Sex of the first-born and obstetric complications in the subsequent birth. A study of 2.3 million second births from Denmark, Finland, Norway, and Sweden.

Laust H MortensenSven CnattingiusMika GisslerKari KlungsøyrRolv SkjaervenAnne-Marie Nybo AndersenHenriette Svarre Nielsen

Published in: Acta obstetricia et gynecologica Scandinavica (2020)

Male sex of the first-born is associated with small increases in risks of obstetric complications in the second birth. Exploration of the underlying mechanisms is needed to increase our knowledge and treatment options for these serious obstetric complications.

Keyphrases

gestational age
pregnant women
risk factors
preterm birth
healthcare
low birth weight
preterm infants
pregnancy outcomes
climate change