in utero vs post-partum

in utero

adj

  • Occurring or residing within the uterus or womb. 

adv

  • Occurring or residing within the uterus or womb. 

post-partum

adj

  • Pertaining to the period immediately after childbirth. 

How often have the words in utero and post-partum occurred in a corpus of books? (source: Google Ngram Viewer )