Impant or IUD

I am currently 25W pregnant, FTM. And I'm still young 27, kaya napagusapan na po namin ni husband ang family planning. Ayoko po sanang magDepo dahil overweight na po ako. We agreed on abstaining for the year muna. Nag-agree namam po si husband sa vasectomy after our 2nd child if God willing. Which is better po ba. Implant or IUD? Planning to have our 2nd child at 30. Salamat po