A somewhat insensitive term for when conception and implantation have occurred, producing a positive pregnancy test, but without sign of a gestational sac appearing on transvaginal ultrasound; in other words, a subclinical miscarriage or a menstrual miscarriage. See also: miscarriage

Early embryo development begins but does not become established, so pregnancy tests are positive at first but become negative. This is usually followed by a late period.

Is a positive hCG blood test with no evidence of a gestation sac on Ultrasound.

pregnancy whose development arrest occurs at such an early stage that it is only detected by the presence of hCG in the blood for a few days.

A pregnancy diagnosed by the presence of the pregnancy hormone HCG, in the blood , but no fetus develops by ultrasound, and the pregnancy stops developing very early.

A pregnancy confirmed by blood and urine test only.

Elevated hormone levels indicate a pregnancy, but implantation and continuing development of the embryo does not occur.

See chemical pregnancy.

When the patient's pregnancy test is positive but no pregnancy is visible on ultrasound scan.