Therefore, the due date is generally calculated from the first day of the last menstrual period (LMP). In this case, 2 weeks are added to the calculation giving a total of 40 weeks (280 days). This is based on the assumption that ovulation/conception occurs on cycle day 14 in the âaverageâ 28 day menstrual cycle.
By Regina Bailey. Definition: The nucleus is a membrane bound structure that contains the cell's hereditary information and controls the cell's growth and reproduction.It is commonly the most prominent organelle in the cell.The nucleus is surrounded by a structure called the nuclear envelope.This membrane separates the contents of the nucleus from the cytoplasm. The cell's chromosomes are also housed within the nucleus.he nucleus is surrounded by a structure called the nuclear envelope. This membrane separates the contents of the nucleus from the cytoplasm. The cell's chromosomes are also housed within the nucleus.
In other fields, such as: In Physics, a nucleus refers to the positively-charged center of an atom that usually contains the protons and neutrons. In Chemistry, a nucleus is a fundamental arrangement of atoms that occur in compounds through substitution of atoms without a change in structure.n Botany, a nucleus is the central kernel of a nut or seed, or the center of a starch granule. In Anatomy, a nucleus is a group of specialized nerve cells in the brain or spinal cord. Word origin: L: kernel, syncopated var. of nuculeus, equiv. to nucu(la) little nut (nuc-, s. of nux nut + -ula-ULE) + -leus n. suffix.