As per my OB (syempre pinatanong ni hubby), its safe to have "contact" /sex but take note, it shouldnt cause any spotting, bleeding, vaginal discomfort.
If maselan ang pagbubuntis, best to avoid it during 1st trimester.
Feel free to ask your OB anything and everything. (para sulit din ang bayad. 😁) kasi mas alam din nila what are okay and our limitations. 👌