"I Became The Hero's Mom"
https://www.mangago.zone/read-manga/i_became_the_hero_s_mom/
This one just came to my mind when I saw the question, the "baby" is really a toddler tho-
https://www.mangago.zone/read-manga/whose_baby_is_it/
https://www.mangago.zone/read-manga/invite_a_wolf_into_the_house/
https://www.mangago.zone/read-manga/komochi_host_no_kiken_na_rinjin/
https://www.mangago.zone/read-manga/kiraide_isasete/
https://www.mangago.zone/read-manga/ceo_s_sudden_proposal/
https://www.mangago.zone/home/mangalist/964633/
Maybe this list can be of help?
Family + no Omegaverse
http://www.mangago.zone/read-manga/kazoku_gokko_kikuya_kikuko/
http://www.mangago.zone/read-manga/the_wolf_in_the_flower_shop/
http://www.mangago.zone/read-manga/terpenoid/
http://www.mangago.zone/read-manga/patchwork_fujitani_youko/
http://www.mangago.zone/read-manga/family_simulation/
http://www.mangago.zone/read-manga/kozure_ookami_inoue_satou/
http://www.mangago.zone/read-manga/koishite_daddy/
http://www.mangago.zone/read-manga/mote_papa_to_dakaretai_junjou_koushi/
http://www.mangago.zone/read-manga/danshi_koukouseiteki_kazoku_keikaku/
http://www.mangago.zone/read-manga/sado_no_otoko_o_otosu_houhou/
http://www.mangago.zone/read-manga/kazoku_ni_narouyo/
http://www.mangago.zone/read-manga/hinadori_wa_shiokaze_ni_madoromu/
http://www.mangago.zone/read-manga/ookami_papa_wa_hitsuji_tsura_shite_yatte_kuru/
http://www.mangago.zone/read-manga/bokura_no_shokutaku/
http://www.mangago.zone/read-manga/ookami_no_ketsuzoku/
For more u can check out my couples with kids list
http://www.mangago.zone/home/mangalist/479595/
My list is exclusive for BL's with their own biological baby
https://www.mangago.zone/home/mangalist/805921/
Hosik's story... no kids at the start though
Does anyone have a list of stories with babies in it? It could be BL or whatever lol just has to have a cute baby. Thank you!