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Osiander's sign
System: Pregnancy & Women's Health Signs · All pregnancy & women's health signs
What it is — and how it is elicited
A strong pulsation can be felt through the side wall (lateral fornix) of the vagina on examination in early pregnancy, from increased blood flow.
What a positive finding suggests
Associated with early pregnancy; one of the older, less-used presumptive signs.
◈ Behind the name
Friedrich Benjamin Osiander (1759–1822), German obstetrician.
Related signs — Pregnancy & Women's Health Signs
Browse the O section of the A–Z list or return to the Clinical Signs hub.
Please note: This page is an educational reference about clinical examination signs. A clinical sign supports — and never replaces — a full clinical evaluation, examination and appropriate testing. A sign being present does not by itself prove a diagnosis, and an absent sign does not rule one out. If you have symptoms that worry you, see a health professional.