Why fertilized eggs dont implant

What is the proper terminology for a pro-life person? The proper terminology should demonstrate and speak to what this new biologic entity is. Some speak of pre-embryos, but this is just a politically correct bit of jargon whose sole purpose is to dehumanize this living human in his or her first week of life. A pre-embryo consists of several million eager sperm swimming after one ovum, but when one of them connects and fertilizes the ovum, this is no longer a pre-embryo; this is now an embryo.

This is a biologic impossibility and, in fact, it is rather subtle pro-abortion propaganda. Your email address will not be published. Save my name, email, and website in this browser for the next time I comment. All Rights Reserved. Privacy Policy. Life Issues Institute welcomes comments relevant to columns that are civil, concise, and respectful of other contributors. Endometrial polyps outgrowths of the lining of the uterus are something that we are always on the watch for, but they can grow even during a treatment cycle.

Endometrial Problems. Problems with the lining of the uterus are uncommon but can have a huge influence on whether or not an embryo implants.

The lining of the uterus is receptive to the embryo for only a brief time, called the Window of Implantation. It is possible that a perfectly normal embryo might not implant because the lining was not ready for it.

In natural cycles, the window may be d wide, but in our treatments in can be only h long. This window is controlled by the hormone progesterone.

The timing, dose and route of administration of progesterone can impact this. This provides us with a tool to work with in this specific group , and we have done well with our patients with abnormal testing.

However, the ERA has not yet been proven to be useful for patients just starting their evaluation, undergoing simple treatments or just starting IVF. Hopefully, over the next couple of years, we will have information as to whether it is helpful in those situations. The lining normally needs to reach a certain thickness about 7 mm to give an embryo a good chance of implanting. Pregnancies can occur with thinner linings, but they are much less likely to occur and the resulting pregnancies can be more complicated.

In some women, thin linings occur due to the lining being damaged surgically, but in many women, we have no obvious reason for the thin lining. For these women, a variety of treatments have been tried estrogen, aspirin, sildenafil, pentoxifylline, Vitamin E and gCSF , but unfortunately they do not have significant impact for most patients.

Chronic endometritis is a disorder where there is inflammation in the lining of the uterus. Endometritis is very uncommon and thus we do not subject our patients to painful biopsies to detect it routinely.

However, when we have not been successful, it is something to consider looking for. Treatment with antibiotics is usually effective when endometritis is found. Evidence continues to mount that the lining of the uterus in endometriosis patients is different and may well be contributing to infertility beyond the clear anatomic issues seen at surgery with advance stages of endometriosis.

Since we are no longer performing laparoscopy on everyone, this is something that can be missed. The mechanism appears to be related to progesterone resistance at a molecular level. Fortunately, it appears that the significant doses of progesterone used in ART treatments overcome this. Technical Issues. Embryo transfer is a subtle technique that not everyone can do.

The procedure needs to be atraumatic to avoid uterine contractions and minimize disrupting the endometrium. Transfers need to be done quickly, so that the embryos are not subject to metabolic stress while awaiting transfer.

The embryos need to be placed in the proper position in the uterus for optimal implantation and to avoid tubal and cervical pregnancies. It takes very little to sabotage this. Well, it is the usual suspects here. Pregnancy rates also appear to be lower when the man is obese, even with normal sperm parameters. Of course, pregnancies can be substantially more risky as our weight increases. Cigarette smoking is another modifiable factor that appears to have its primary manifestation through altering ovarian function and oocyte quality.

Consider these tips to stay healthy. Some women have difficulty conceiving because of problems in their reproductive system such as a congenital malformation and require surgery. Learn more here. Hormones secreted by the hypothalamus, the pituitary and the ovary are the messengers that regulate the menstrual cycle. High-risk pregnancy.

Infertility in men. Infertility in women. Donor Sperm Insemination. Intrauterine Insemination IUI. Pre-Implantation Genetic Diagnosis. Patient Education. To become pregnant , the following steps must occur: Sperm transport — The sperm must be deposited and transported to the site of fertilization. Egg transport — Ovulation must occur and the egg must be "picked up" by the tube. Fertilization and embryo development — Union between the sperm and egg must result.

Implantation — The embryo must implant and begin to grow in the uterus. These steps are described below. Sperm Transport The transport of sperm depends on several factors: The sperm must be capable of propelling themselves through the environment of the female vagina and cervix.

This environment, which is under cyclic hormonal control, must be favorable to admit the sperm without destroying them. The sperm must possess the capability of converting to a form that can penetrate the cell membrane of the egg capacitation. Egg Transport Egg transport begins at ovulation and ends once the egg reaches the uterus. Fertilization and Embryo Development Following ovulation, the egg is capable of fertilization for only 12 to 24 hours.

Implantation Once the embryo reaches the blastocyst stage, approximately five to six days after fertilization, it hatches out of its zona pellucida and begins the process of implantation in the uterus.

Recommended reading. Eating Right Before and During Pregnancy It is important to get the nutrients you need both before getting pregnant and during your pregnancy. Infertility Risk Factors Maternal age is probably the most significant factor related to a woman's ability to conceive. Ovulation Induction Ovulation induction uses hormonal therapy to stimulate egg development and release, or ovulation, the goal being to produce a single, healthy egg.

Reducing Your Risk of Infertility Your overall health is a reflection of your reproductive health.