USA immigration entry - Pregnant women with green card

Hi all members,

I have already gone through lots of reviews and it helped a lot. Thanks to all moderators and members for their kind support and immediate responses.

My wife is green card holder and she needs to travel every 9 months into USA to keep her green card status active. My wife has a Pakistani passport. She is 5 months pregnant and she was supposed to travel by 9th March but could not travel due to her pregnancy as doctor has advised her rest in the initial 4-5 months because she already had a miscarriage last year.

Now she is willing to travel USA by 15th April (will be 10 months & 2 weeks since the last entry into USA).

Appreciate your suggestions and feedback so we can avoid any hassle at immigration.

Thank You