Did early Muslims in Islam believe that the man ejeculation fluid and the women ejeculation fluid mixed together to make a baby

I found this hadith in Bukhari where whatever the fluid first touches will resemble the child. Is this true that early muslims believed this?

https://sunnah.com/bukhari:3938

I found this hadith in Bukhari where whatever the fluid first touches will resemble the child. Is this true that early muslims believed this?

https://sunnah.com/bukhari:3938