BeSha'ah tovah! We are happy to hear that the fetus is all right and wish you a refuah sheleimah and a safe continuation of your pregnancy.

A subchorionic hematoma is typically an accumulation of blood between the placental membrane and the uterine wall. Halachically, placental bleeding is treated as uterine bleeding, because there is no clear way to determine whether or not it is from a wound (dam makkah). Therefore, bleeding from a subchorionic hematoma can make a woman niddah.

Accordingly, if you had a stain larger than the size of a gris (approximately an Israeli shekel or US dime) on the white portion of your underwear, or if your bleeding was a "flow" and not just staining, you are niddah and should make a hefsek taharah, observe seven clean days, and immerse. If you have any difficulty with becoming tehorah, please contact us with details.

Since the laws of stains also apply to stains from placental bleeding, and to bleeding during the seven clean days, a review of our site's articles on stains, "Ketamim" and "Toilet Paper," may prove helpful.

Please don't hesitate to write back with any further questions.

This response was updated on 27 January, 2026.