Table 3 The proposed different categorizations of the three forms of pregnancy loss
Miscarriage | A history of miscarriage: one or more miscarriages | Recurrent miscarriage: multiple miscarriages, defined in publications as a history of 2+ or 3+ miscarriages | Dose-response relationship: the number of miscarriages categorized as 0, 1, 2, and 3 or more |
Stillbirth | A history of stillbirth: one or more stillbirths | Recurrent stillbirth: multiple stillbirths, defined in publications as a history of 2+ or 3+ stillbirths | Dose-response relationship: the number of stillbirths categorized as 0, 1, 2, and 3 or more |
Abortion | A history of abortion: one or more abortions | Recurrent abortion: multiple abortions, defined in publications as a history of 2+ or 3+ abortions | Dose-response relationship: the number of abortions categorized as 0, 1, 2, and 3 or more |