PERSONAL EXPERIENCE.
I left my daughter's biological father when I was 3 months pregnant and met a guy I thought I really liked and started dating him. After I had my daughter... I realized I didn't love him (He cheated on me and he wasn't all I expected him to be) and I left him. I really hurt him. He signed my daughters birth certificate (I only let him because I didn't want to hurt him and say no... Now my husband and I have to go through a lengthy process to have him removed. :[)
No I don't expect this to happen the same as it did for me... I was beyond naive and being very selfish.
I met my husband after I had my daughter... she was a few months old... and HE is my savior. I don't know what I would do without him (I didn't feel this way with my ex... I was just mostly annoyed with him) Timmy (my husband) took in my daughter as his own and LOVES her, and he LOVES me! We have a fantastic relationship and are expecting our second child at the end of December.
Just make sure he KNOWS that your having a BABY and you are both on the same page...
I think it can be fine and wonderful... just avoid the mistakes I made. And congrats on the baby!
My daughters biological father is diagnosed schizophrenic and was very unpredictable and dangerous.
OH and NO ONE would guess my husband wasn't my daughters real dad, and I love him more because of his love for Cecelia, he is a PHENOMENAL father and I wish I had met him during my pregnancy.