Depends. If the placenta comes out as well the umbilical coed is attached to it. if it's just the fetus, no unless the cord let go of the placenta. You always have to go and get checked afterwards.
yes
If the placenta don't function the embryo will die.
You need to seek medical attention as soon as possible. Even though you have a miscarriage it doesn't mean your body removed everything from the pregnancy. If you still have part of the placenta or baby inside your uterus it could cause severe infections.
A fetus can die inside you but not come out so then it is still a miscarriage. You have to see the doctor if you suspect a miscarriage.
It mean that she has had a miscarriage before the full term.
After a miscarriage at 12 weeks, the placenta typically does not pulsate. Once the pregnancy ends and the fetus is no longer viable, the placental blood flow ceases, and the placenta will gradually begin to separate and be expelled from the body. Any residual pulsation might be due to blood flow in the mother's body, but the placenta itself would not exhibit pulsation similar to that during a viable pregnancy.
Otherwise it can not grow into a baby. It will get no nutrients from a placenta and will be a miscarriage.
It might separate from the wall of the uterus causing a miscarriage.
You have to see a doctor after a miscarriage and he will know.
An ultrasound scan will show if you have had a miscarriage. Sometimes you may bleed from near the placenta (afterbirth) but you don't miscarry and it will show this too. Sometimes you bleed and lose the baby but not all the placenta comes away which can be dangerous, causing bleeding and/or infection. the ultrasound scan can show all these things.
Yes