«We were able to show by live cell imaging that polarization of the cell
occurs after fertilization of the egg cell, and both MTs and F - actin play a role in inducing asymmetric cell division to form the plant's body axis,» says Ueda.
It is the product of the ripened ovule of gymnosperm and angiosperm plants which
occurs after fertilization and some growth with in the motherplant.
And for the majority of embryologists who stubbornly believe that life begins at fertilization rather than implantation, a drug or device whose contraceptive action
occurs after fertilization does cause an abortion.
But those who claim some methods of contraception are abortifacients give it that classification becaue the ending of pregnacy
occurs after fertilization.
Antonio Giraldez (Yale University)-- A developmental biologist, Dr. Giraldez works on deciphering the regulatory code that shapes embryogenesis, the earliest events that
occur after fertilization.
Not exact matches
So researchers at the NIH in 2013 — equipped with the latest tools of science — decided to check this number by instead measuring a pregnancy from the moment of ovulation (
fertilization usually
occurs within 12 to 24 hours
after an egg is released).
When ovulation and
fertilization have
occurred, the fertilized egg travels down the fallopian tube towards the uterus where implantation takes place, about 6 - 12 days
after fertilization.
The last piece of evidence together with the fact that the parents do not carry the alterations suggest that the extra copies of genes may have
occurred either in the sperm or the egg, the parent's germ cells, and before or very early
after fertilization.
However, we know that there are other types of changes that might
occur in a very, very minute number of situations, where the actual DNA sequence might differ due to mutations that
occur even
after fertilization...
Using a newly developed method researchers at the Institute of Molecular Biotechnology of the Austrian Academy of Sciences (IMBA) have been able to shed light on the complexity of genome reorganization
occurring during the first hours
after fertilization in the single - cell mammalian embryo.
Although the disease appears to be caused by a genetic defect, it doesn't run in families, suggesting that the mutation
occurs randomly in egg or sperm cells or at some point
after fertilization.
Nagoya, Japan — Dr. Daisuke Maruyama and Professor Tetsuya Higashiyama at the Institute of Transformative Bio-Molecules (WPI - ITbM) of Nagoya University and the JST - ERATO Higashiyama Live - Holonics Project along with their international team have shown by live - cell imaging techniques that flowering plants, such as Arabidopsis thaliana undergo a cell to cell fusion to prevent the attraction of the second pollen tube
after fertilization has
occurred.
Future experiments to validate this model by directly manipulating signaling between conceptus and endometrium will allow for a more precise understanding of the mechanisms of pregnancy failures that
occur during the periimplantation period
after normal
fertilization and SCNT cloning.
The uterine lining sloughs off from Day 1 to Day 5, which is what we call the menses, and then
after that, it regenerates itself until ovulation
occurs on Day 14, and if
fertilization does not
occur, the endometrial lining will be sloughed off again resulting in the menses.