https://www.mangago.zone/read-manga/best_friends/ (omegaverse, main couple has a baby in the last side story)
https://www.mangago.zone/read-manga/oshikake_nyobo_kodomo_tuki/ (not omegaverse but MC and FL have a biological baby)
https://www.mangago.zone/read-manga/perfect_heroine_wants_to_possess_me_bbl_scans/ (omegaverse, no baby)
https://www.mangago.zone/read-manga/you_taste_a_little_sweet/ (omegaverse, no baby so far)
https://www.mangago.zone/read-manga/the_two_faced_heroine_is_obsessed_with_marking_me/ (omegaverse, no baby so far)
https://www.mangago.zone/read-manga/eve_and_eve/ (chapter 4; not omegaverse but both girls impregnate each other via alien powers or something lol)
https://www.mangago.zone/read-manga/on_the_promised_night/ (one-shot; not omegaverse but one girl impregnates the other via magic)
https://www.mangago.zone/read-manga/fox_s_wedding_1/ (one-shot; not omegaverse but one girl impregnates the other via demonic powers)
Okay so you know how there's omegaverse in bl where two guys can have a baby, is there like the same thing but gl? two girls have a baby?