birth partnernoun [ C ]
/ˈbɜːθ ˌpɑːt.nər//ˈbɝːθ ˌpɑːrt.nɚ/also birthing partner, /ˈbɜː.θɪŋ ˌpɑːt.nər//ˈbɝː.θɪŋ ˌpɑːrt.nɚ/a partner, friend, or family member who stays with and supports a woman when she is giving birth to a baby:
Some women prefer to have their mother, sister, or a female friend as their birth partner.