Healer Meliora likely didn't know about the exact rituals. She couldn’t assess the consequences of such old family magic, but she knew enough about magical pregnancies that what had occurred was not necessarily a cause for alarm. At least, that is what Hermione told herself. A small part of her was still skeptical; she knew that her upcoming visit with Draco could be painful. She couldn’t see how being without magic and how the erasure of his memories could benefit either one of them. Perhaps the Healer was just trying to placate her so she wouldn’t put the baby’s health at risk.