Key clinical features and symptoms that may suggest a diagnosis of molar pregnancy, a form of gestational trophoblastic disease, often overlap with those of a miscarriage NICE NG126,NICE CKS.
Common presentations include vaginal bleeding NICE NG126Chawla et al. 2023. Patients may also experience excessive nausea and vomiting, referred to as hyperemesis gravidarum [ (Heřman et al., 2025), (Chawla et al., 2023)].
On examination, the uterus may be larger than expected for the gestational age [ (Heřman et al., 2025), (Chawla et al., 2023)]. Laboratory tests typically reveal abnormally high levels of human chorionic gonadotropin (hCG) [ (Heřman et al., 2025), (Chawla et al., 2023)].
Other less common but significant indicators can include the absence of fetal heart sounds [ (Heřman et al., 2025)], the early onset of pre-eclampsia [ (Heřman et al., 2025), (Chawla et al., 2023)], or the passage of 'grape-like' vesicles [ (Heřman et al., 2025), (Chawla et al., 2023)]. Definitive diagnosis relies on histopathological examination [ (Sebire, 2010), (Heřman et al., 2025)].
Key References
- NG126 - Ectopic pregnancy and miscarriage: diagnosis and initial management
- CKS - Ectopic pregnancy
- CKS - Miscarriage
- CKS - Infertility
- (Sebire, 2010): Histopathological diagnosis of hydatidiform mole: contemporary features and clinical implications.
- (Heřman et al., 2025): Histopathological and clinical features of molar pregnancy.
- (Chawla et al., 2023): Gestational trophoblastic disease: an update.