Idk if you necessarily will HAVE to use them....but once I started getting low prog readings in early preg, it's been that way every time. So that's happened to me with 4 subsequent pregnancies - 1 chem preg, 2 healthy babies, and 1 ectopic. I have heard tho that taking prog won't sustain a preg that was doomed anyway....likewise, it won't hurt a viable pregnancy. Hope this info helps!
, 39 years old; DH
, 40 years old
DD - 12
, DD - 9
(both from previous marriage), and me and DH have DS - 4