If the embryo did not prevent menstruation, the hormonal signals necessary to maintain the uterine lining would not be produced, leading to the shedding of the endometrium. This would result in a menstrual period, effectively terminating the pregnancy. Without the embryo's signals, the body would treat the pregnancy as non-existent, and normal menstrual cycles would resume.
The embryo/fetus would die.
This wouldn't happen. Ovulation occurs around two weeks before menstruation, if fertilisation occurs the egg travels down the fallopian tubes to implant in the uterus, pregnancy hormones act to present menstruation so that the zygote/embryo isn't lost. Some women can have a shorter luteal phase (the phase where the fertilised egg would travel to the uterus and implant) which may mean that there isn't enough time for the pregnancy hormones to act to prevent menstruation, thus the pregnancy wouldn't occur. But no one would have a luteal phase so short as to cause menstruation straight after ovulation.
The embryo will develop into a foetus in the womb.
Much the same as would happen at any other time, but possibly with more mess.
HIV does not prevent menstruation. Women with HIV still have periods.
If the chick embryo's cells did not specialize, it would not be able to develop into distinct tissues and organs necessary for survival. Specialization is essential for the proper function of different cell types in the body, and without it, the embryo would not be able to form a fully functioning organism.
After puberty, the ovaries release one egg each month alternatively. The sperms enter through the vagina, travel upwards to the oviduct where they encounter the egg. If the egg is fertilized, a zygote is formed. The zygote repeatedly divided to form the embryo. This embryo trickles down to the uterus. On the uterine wall, the embryo gets implanted. The embryo gets nutrition form a special disc shaped tissue towards the uterine wall called the placenta. It contains villi on the embryo's side and provides nourishment and oxygen from the mother's blood. Waste substances such as carbon dioxide and nitrogenous wastes are taken away from the embryo. After the 9 month gestation period, the child is delivered as a result of rhythmic contractions of the uterus.
we will get a zygote with triploid chromosomal content,but this case is inviable so the embryo will die after a certain period.
no.
Any animal that hatches from a shell comes from an embryo. Actually any animal at all comes from an embryo. But the most common animal you would think of would be a chick.
in the absence of fertilization the ova would rupture leading to menstruation.
No.