lying-in(n = noun.state) childbed, confinement, labor, labour, parturiency, travail - concluding state of pregnancy; from the onset of contractions to the birth of a child; "she was in labor for six hours"
is a kind of birth, birthing, giving birth, parturition
is a part of gestation, maternity, pregnancy
has parts: uterine contraction, effacement, asynclitism, obliquity
has particulars: premature labor, premature labour

1.  The state attending, and consequent to, childbirth; confinement; as, a lying-in hospital. [1913 Webster]

2.  The act of bearing a child. [1913 Webster]