Ectopic pregnancies happen when
a fertilized egg implants someplace other than in the uterus, such as in one of the fallopian tubes.
At that time,
the fertilized egg implants itself to the wall of the uterus.
ectopic pregnancy, when
the fertilized egg implants somewhere other than the uterus, often in one of the fallopian tubes
An estimated twenty percent of women will experience bleeding when
the fertilized egg implants into the uterus.
This is typically known as implantation bleeding, when
the fertilized egg implants itself on the uterine wall.
During an ectopic pregnancy (sometimes called a tubal pregnancy)
a fertilized egg implants itself outside the womb in contrast to a normal pregnancy where the egg implants within the uterus.
If a woman becomes pregnant,
the fertilized egg implants in the uterine wall and progesterone production is eventually taken over by the placenta, which acts like an extra endocrine organ.
Pregnancies are ectopic when
the fertilized egg implants outside the lining of the womb, usually in the fallopian tube.
After ovulation, the corpus luteum (a fancy Latin word for the structure that remains after the ovarian follicle releases the egg) produces progesterone, which helps
a fertilized egg implant into the wall of the uterus.
If
no fertilized egg implants itself in the uterus, it sheds its lining.
You may also experience light spotting if
a fertilized egg implants into the uterus.
This test checks for the hormone relaxin, which is produced when
the fertilized egg implants.
Pregnancy happens if a sperm cell meets up with one of your eggs, and
the fertilized egg implants in your uterus.
Pregnancy happens if sperm fertilizes your egg, and
the fertilized egg implants in the lining of your uterus.
IVF works by using a combination of medicines and surgical procedures to help sperm fertilize an egg, and help
the fertilized egg implant in your uterus.
Non-identical twins (also called «fraternal» twins), are made when two separate eggs are fertilized by two separate sperm, and
both fertilized eggs implant in the uterus.
Pregnancy officially starts when
a fertilized egg implants in the lining of the uterus.
Not exact matches
They also create an inhospitable environment within the uterus, which means that it is not a suitable environment for
fertilized eggs to
implant and grow.
Later it costs another several thousand to thaw and
fertilize the
eggs and
implant them in the womb.
Topher, or perhaps the ark had a cryogenics labbratory where they kept frozen
fertilized dinasour embryos that could be later
implanted into ostrich
eggs.
When you consider the billions of
fertilized eggs that never
implanted or failed to thrive after implantation, you have to realize that nature (or god) does not hesitate to allow those potential people to be discarded en mass in the process of procreation.
There are some in the anti-abortion movement who believe with every fiber in their being that life begins when the
fertilized egg is
implanted — of course the ones who believe in this AND believe in birth control, better funding of birth control and the like are in the minority.
Up to 80 % of all
fertilized eggs fail to
implant, and women have normal periods without even suspecting how close they came to being pregnant.
So if the pill fails in its primary task, and ovulation occurs, a
fertilized egg will not be able to
implant, and the very brief pregnancy will be terminated.
If one reads the fine print on any variety of combined oral contraceptive, it becomes evident that one function is to diminish the endometrium and create an unstable environment for a
fertilized egg to
implant.
30 - 50 % of all
fertilized eggs do not
implant naturally.
The
fertilized egg needs to
implant in the uterus to develop properly.
An ectopic pregnancy is a pregnancy in which the
fertilized egg doesn't
implant in the wall of the uterus as it should.
If more than two
eggs are released,
fertilized, and
implant, the result is multizygotic multiples, higher order multiples such as triplets (3), quadruplets (4), quintuplets (5), sextuplets (6), septuplets (7), octuplets (8), or even more, although no multiples beyond octuplets have ever been known to survive.
If two
eggs are
fertilized during sexual intercourse and both successfully
implant in the uterus, the result is a multiple pregnancy.
When the
egg is
fertilized it is called an embryo, and that embryo is then
implanted in the woman's uterus.
Meanwhile, seven or eight days after a sperm
fertilizes an
egg in week 4 of pregnancy, a mass of cells — the earliest form of an embryo —
implants into the wall of the uterus.
ECPs are a regimen of hormone pills that can prevent pregnancy after unprotected intercourse by temporarily blocking ovulation, interfering with fertilization, or thinning the lining of the uterus to keep a
fertilized egg from becoming
implanted.
The
egg is
fertilized by a sperm then
implanted in the in the lining of the uterus to develop to placenta and embryo, and later to fetus.
The scientists then
fertilized the modified
egg with the father's sperm before
implanting it into the mother's uterus.
If you take 100
fertilized eggs, let's say only 20 percent of them are going to
implant and make a baby.
But this is the first time all the processes — harvesting the immature
egg, maturing it in a test tube, freezing, thawing,
fertilizing, and
implanting it — have been put together to produce a healthy baby.
Cohen and his team then
fertilized the
eggs in the laboratory with sperm and
implanted them in the womb.
So doctors suggested the couple consider
implanting a donor
egg fertilized with Alan's sperm.
If her tubes are blocked, her
fertilized egg can be
implanted and the pregnancy can continue in the conventional way.
Although the statistics on the failure rate of human fertilization are not entirely robust, given the biological and ethical delicacy of conducting research in this area, the numbers consistently suggest that, at minimum, two - thirds of all human
eggs fertilized during normal conception either fail to
implant at the end of the first week or later spontaneously abort.
A second study, by a different research group, tracked human and mouse embryo development from
fertilized egg to about six days later, just before the embryo
implants in the uterine wall.
The researchers then injected the nucleus of an
egg from a second macaque,
fertilized the cell with sperm, and
implanted it in the second monkey's womb.
In 1938, Hans Spemann showed that a nucleus from a
fertilized salamander
egg that had already undergone cell division several times could be
implanted into a cell from a newly
fertilized salamander
egg that is enucleated (has had its nucleus removed) and create an entire adult salamander (Spemann, 1938).
So a
fertilized egg can take several days to
implant and begin growing in a woman's uterus, leading to initial hCG tests and ultrasound results that seem to indicate an embryo that is slow to develop and therefore likely to be miscarried.
If no
fertilized egg is
implanted, a hormonal process goes into action, triggering the shedding of the uterine lining as your normal menstrual period.
When this occurs, despite successful conception, the
fertilized egg can't
implant and instead ends up being expelled along with menstrual blood.
If your luteal phase is too short, however, there is not enough time for the
fertilized egg to successfully
implant before the hormonal signal to shed the lining.
The
fertilized egg is then
implanted in the patient's uterus.
With too short of a luteal phase, the
fertilized egg may not be able to make it down the fallopian tubes into the uterus to
implant before your period comes making pregnancy much more difficult.