Does maternal underweight prior to conception influence pregnancy risks and outcome?

Aim: Data analyzing risks during pregnancy and neonatal outcome in Caucasian women with pre-conceptional underweight are scarce.

Patients And Methods: We conducted a retrospective cohort study in Northern Germany comparing pregnancy risks and neonatal outcomes in nulliparous women with either pre-conceptional underweight or normal weight.

Results: The data of 3,854 nulliparous women with either underweight (n = 243; BMI ≤ 18.