| Name | Info | Provider | Link |
|---|---|---|---|
| subscription/membership/fee required | Elsevier Science | https://linkinghub.elsevier.com/retrieve/pii/S0020-7292(07)00399-2 | |
| Vaginal Bleeding | free resource | MedlinePlus Health Information | https://medlineplus.gov/vaginalbleeding.html |
| subscription/membership/fee required | Wiley | https://doi.org/10.1016/j.ijgo.2007.05.040 |