He replied by arbitrarily inventing his own parameters for when a fetus feels pain.
Without the influence of testosterone in the womb, a fetus will develop into a girl.
Kansas restricts late-term abortions once a fetus is deemed able to survive outside the womb.
For a fetus to form, the blastocyst must be implanted in a womb.
The way testosterone acts to turn a fetus male is still poorly understood.
Reagan said there was a distinction between an embryo and a fetus.
Wade decision, which legalized abortion until a fetus can viably survive outside of the womb, which is typically at 22 to 24 weeks.
Since a fetus resides fairly deep inside a woman's body, there is a limit to how fine-grained an image of it can be.
The American College of Obstetricians and Gynecologists, however, says it knows of no legitimate scientific information supporting the idea that a fetus experiences pain.
But some abortion-rights activists view the potential move as a step toward trying to create a legal precedent for recognizing a fetus as a person.
But fish is a good source of protein and the best source of Omega-3 fatty acids, which are essential for the development of a fetus.
In 1990 Goodfellow and colleague Robert Lovell-Badge discovered the genetic "switch" that decides whether a fetus' gender-neutral gonad develops into a female ovary or male testes.
But it turns out Muslim tradition has always been fairly liberal in its interpretation about the point at which a fetus can be considered fully human.
Because of the way that sex is determined in people, such exposure might cause a fetus to develop characteristics more usually associated with men than women.
If the new tests are adopted, eventually only women who find a fetus has a condition would need to confirm the results with an invasive procedure.
He found a fetus releases its DNA into the plasma of the mother during pregnancy, though within two hours of giving birth, the baby's DNA vanishes.
False-negative results, which are rarer, also present a quandary for women and doctors who may not find out until much later that a fetus has an abnormality.
"This bill, for the first time, would recognize a fetus as a person, with rights separate and equal from those of the woman, " said Rep. Hilda Solis, D-California.
Even pregnant women, who are usually urged not to take medication which can be dangerous for a fetus, should take the antivirals if they get swine flu, she said.
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The ultrasound and other technologies that identify the sex of a fetus started out as diagnostic devices to help people with sex-linked diseases, such as haemophilia, conceive healthy children.
When a photo of a fetus was projected onto a pull-down screen, one juror gasped and shut her eyes, while several other jurors shifted in their seats and took notes.
Unless New Mexico intends to only prosecute accused rapists or practitioners of incest who impregnate their victims, the existence of a fetus is no evidence of rape or incest whatsoever.
For example, sometimes a fetus might be diagnosed with having a congenital cystic adenomatoid malformation -- an abnormal formation in the lungs -- but actually turns out to have a diaphragmatic hernia.
"In traditional thinking, a fetus is a living thing, so when you have an abortion, there are bad psychological consequences, " says sociologist Khuat Thu Hong of the National Center for Social Sciences.
The letter said HHS Secretary Tommy Thompson wants to allow a fetus to qualify as a "targeted low-income child" under the CHIP program, a Clinton administration initiative designed to increase health insurance coverage for children.
But, to the dismay of some anti-abortion campaigners, that change would give a higher priority to the mother's life if she is in danger (other than from a suicide threat) than to a fetus's right to life.
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There is, however, at least one way that a fetus without an SRY gene can be exposed to testosterone in the womb and that is if she has a twin brother who is releasing his hormones into the fluid that bathes them both.
The use of either two-dimensional (2D) or three-dimensional (3D) ultrasound to only view the fetus, obtain a picture of the fetus or determine the fetal gender without a medical indication is inappropriate and contrary to responsible medical practice.
Sometimes parents choose to terminate a pregnancy when the fetus has a severe abnormality -- but they should make sure they have the right diagnosis before they do it.
Republicans sought to bolster their case by providing a variety of examples of crimes they said have gone unpunished because some states and the military justice system do not recognize the fetus as a legal entity.
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