or home pregnancy tests,
work by measuring the level of HCG (human chorionic gonadotropin)
present in a woman`s blood or urine.
This level builds up over the entire course of the pregnancy,
beginning from day 1,
and even after a complete miscarriage or an abortion,
there will still be some HCG left in the body/bloodstream (and therefore the urine)
which will still show up as a "positive" result on a HPT for many weeks.
The only way to tell for sure at 11 weeks if the baby is still alive is to have a series of blood tests done by your doctor every few days to determine if the HCG levels are rising like they should,
have an ultrasound done to check on the fetus & look for it`s heartbeat,
or to check for the heartbeat with a doppler monitor.
Also important to note:
if you have not been to a doctor by 11 weeks to know for sure that the baby is implanted in the uterus and not someplace else,
or that there is even indeed a fetus present at all,
PLEASE schedule an appointment immediately and get everything checked out.
Ectopic and molar pregnancies can give "positive" results on HPTs (more often called "false positives" due to the outcome),
and both of those scenarios put your health and life at risk the longer they are left unknown and/or untreated.