Primiparous

[The linea nigra] may generally be regarded, especially in a primiparous female, as a certain sign of pregnancy[…]

Seashore et al. (1973) found that in comparison to multiparous women, primiparous women separated from their premature babies undergo greater loss of self-confidence, an effect that apparently can be reversed if primiparous women have had prior experience caring for infants.