The symptom and sign which indicate placenta previa here is Pinless vaginal bleeding.
Placenta previa is a condition where the placenta is covering the cervix or it is attached close to the cervix.
In various times of pregnancy, bleeding may occur. It can not be a serious complication. The cause of the bleeding may depend on the amount of pain or the time of bleeding in pregnancy.
In the first trimester, bleeding may occur and may be due to ectopic pregnancy, miscarriage, implantation of the placenta in the uterus or infection.
Bleeding in late pregnancy lets say twenty weeks can be due to placenta previa or placental abruption.
<span>no because organisms such as humans are omnivores they can eat both meat and plants and may act as 1st,2nd or 3rd level heterotroph.</span>
<span>Altruism is a selfless behavior so the animal would behave that way because it's intention is to put others before itself.
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Yes the answer is genes.
Polygenic traits are determined by multiple gene received from each parent.