after 140 approved, you can extend H1 for 3 years.
(using Pending LC can do H1b 7th-year extension, but your LC already approved, you have to wait until 140 approved)
2. I485的體檢 result should file with all your 485 applications. but Doctor can mark you are preganent and you could not get shot/x-ray etc in I-693 form. but finally when USCIS is processing your case, they would send RFE and asks for 體檢 again. otherwise, they could not approve your case.
3. 如果先遞I140,過兩三個月再遞I485,還算是CONCURRENT FILING if after兩三個月 your PD is still current. BUT if PD retrogression happens again in 2 or 3 months, you could not file I-485.
that is what I understand, for your reference.
good luck