TTCing,
My 1st and 2nd FET is medicated cycle. First, start with birth control pills for one month to suppress ovary activity. Then about 20 days of BCP, start Lucrin jab, also to suppress ovary activity. Period will come about 3-5 days after stopping BCP. Then that cycle will be your ET cycle. Lucrin jabs go on until your lining is thick enough, then doctor will inform you when your ET will be and when they will thaw the embryos.
Example for me - started birth control pills on 20 Mar until 18 Apr. Lucrin jabs started about 14 Apr. Menses came on 22 Apr, then on 5 May, doctor said lining should be thick enough. Lurcing jabs stopped 5 May. Embryos thawed on 8 May, ET on 10 May. All in all, I think must see Dr Cheng about 2-3 times before ET.
My next scan is this Sat. I'm praying that everything is ok and that they grow healthily.