The loss of an embryo or fetus during the first 20 weeks of pregnancy is referred to as a miscarriage or

The loss of an embryo or fetus during the first 20 weeks of pregnancy is referred to as a miscarriage or .

spontaneous abortion.

Explanation:

A miscarriage or spontaneous abortion is the loss of a fetus inside the first 20 weeks of pregnancy. It is called that because the women have not developed the rights conditions to carry the fetus into its final stage. The majority of miscarriages happen in the first 12 weeks of pregnancy and they are due to age, substance influence, diabetes, and thyroid problems. Which develop in most of the cases chromosomal abnormalities.

prophase: we can observe the chromosomes to coil up and condense. they become visible. nuclear membrane and envelope disintigrate.s

metaphase: chromosomes align at the center, the metaphase plate. spindle fibers attach to centromeres of the sister chromatids. they meet at kinetochores.

anaphase: sister chromatids are pulled towards each opposing centromere, set on different poles.

telophase: chromosomes are now clustered up only on either sides of the cell. nuclear membranes reform, and a new cell wall forms along the cell plate. this will lead to cytokinesis, the process that divides the cell membrane and forms the cell wall.