Do I need to go in for post op after an amniocentesis?

No. The needling procedures do not require postoperative check - the needle trauma is minimal and complications are rare. Specific symptoms to look out for and promptly report to your physician/hospital er: vaginal bleeding, leaking fluid per vaginam, fever >100f, worsening lower abdominal/back cramping. Bedrest for the day of the procedure is advisable, but may return to normal activity the next day.