Intralipid is a 20% intravenously administered fat emulsion routinely used as a source of fat and energy for patients in need of extra intake intravenously. Intralipid has been used for many years for this purpose. Intralipid is composed of purified soybean oil, purified egg phospholipids, glycerol, and water.
There is some evidence that Intralipid is effective in preventing pregnancy loss due to immunologic issues, particularly elevated natural killer cells or other unidentified immunologic causes. For many years, the treatment of this problem was Intravenous Immunoglobulins (IVIg), but this treatment can cost thousands of dollars a month to administer and is human derived. Based on in vitro studies, Intralipid seems to suppress Natural Killer cell cytotoxicity. It has been shown in patients that Intralipid clearly decreases the number of natural killer cells.
Early clinical studies have demonstrated success with Intralipid in couples with repeated pregnancy loss as well as couples with recurrent implantation failure.
Intralipid is given by intravenous infusion in an office setting. 100 mls of Intralipid are mixed with 500 mls of normal saline. This infusion takes 60-90 minutes. Treatment is begun at the start of the IVF cycle and continued monthly should a positive pregnancy test result until the 24th week of pregnancy.
Intralipid costs $455 per administration.
There are no side effects to Intralipid administration and there are no known risks.
If the ultrasound fails to demonstrate a pregnancy within the uterus, an ectopic pregnancy must be suspected. If the hCG levels do not rise appropriately, the same is true. If the ultrasound demonstrates a gestational sac but no fetal pole, this is known as an empty sac, or blighted ovum. This is not a normal pregnancy (the vast majority of these have abnormal chromosomes) and is destined to miscarry.
If an ultrasound performed two to three weeks after the first ultrasound, or four to five weeks after the missed period, demonstrates that the fetus has continued to develop and a heartbeat is present, the likelihood is very high that the pregnancy will be successful.
Miscarriage, or spontaneous abortion, occurs in about fifteen to twenty percent of all pregnancies, regardless of how they were conceived. Most early losses are a result of the conceptus being genetically abnormal. As few as one in three human conceptions is genetically normal, but most of the genetically abnormal conceptions are lost before the woman even knows she is pregnant. Even so, some genetically abnormal conceptions do survive long enough to result in a recognized pregnancy. These are often concep-tions that have three sets of chromosomes (triploidy) rather than two, or conceptions that have an extra of just one chromosome (trisomy). These may present as an empty sac, or blighted ovum, which is a pregnancy in which there is no identifiable fetal tissue, or as a fetus that develops only briefly and then ceases. The human genetic message is very specific, and any variation from the normal set of forty-six chromosomes is rarely compatible with life.
Spontaneous abortion is, then, one possible outcome any time a conception occurs, and the chances are about one in five that any clinically recognized pregnancy will be aborted. And the chances do increase as the woman gets older. Older eggs don' divide as well when they get fertilized, and therefore the resulting pregnancies are more often abnormal. The chances of spontaneous abortion rises to as high as fifty percent in women in their early to mid-forties.
So how do we decide whether the loss of a pregnancy is just chance or the result of some other underlying problem that requires investigation? Most of the time, a single loss is attributed to bad luck unless some other factor is apparent. During their reproductive life-span, most women will experience at least one miscarriage. Should, however, two, or certainly three, losses occur without any successful pregnancies in between, evaluation is warranted. There are no hard and fast answers as to whether investigation should be initiated after two or three losses. The chances of another loss do increase slightly after two losses, particularly in older couples. Some investigation may be warranted at this time. After three losses, there is no question.
© 2005 Jarrett Fertility Group