Is it common for hair to be thinner after recent miscarriage? it's a lot thinner than it was before pregnancy. will it thicken up again?

Thinning Hair: I am sorry to hear about your loss. The more estrogen in your body during pregnancy can give you very luxuriant hair and you shed less. But after a miscarriage the hormone levels can drop back to normal, and the hair that was on hold goes from growth to resting state and then will shed. This shedding can be quite noticeable for at least a 3-4 months after the miscarriage then slow.