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Irene bravely finished sharing the stories behind her previous four miscarriages. She gathered herself together and we began going down the list of possibilities, searching for a reason to explain her many pregnancy losses, and more importantly, hoping to figure out the right interventions to minimize the chance of a fifth one.
In no particular order, we started by discussing ANATOMICAL causes. A baby needs a certain type of safe environment in which to grow. If the uterine cavity is an abnormal shape, is an abnormal size or if it contains a mass pushing in on it, this can create a suboptimal site of implantation, thereby increasing the odds of miscarriage. In general, for patients with anatomical factors, I’ve seen more pregnancy losses later on in the pregnancy, rather than in the very early first trimester, as Irene’s had been.
Next, we discussed GENETIC causes. Sometimes, a husband or a wife who looks normal, carries what’s called a translocation in their genes. This leads to an increased risk of miscarriage, so that rather than the usual 15% risk of miscarriage for average couples, the couple in question will have over a 60% risk of miscarriage. There is no cure for it, but there are solutions, such as IVF with PGD to help pick the normal embryos. Another choice which is rarely taken is to use someone else’s sperm or egg (depending on which spouse carries the translocation). The strategy I see adopted the most by these couple is just to get pregnant frequently and often so that despite many miscarriages, eventually one will take.
We then discussed INFECTIOUS causes. Some women don’t realize they have a low-level chronic infection that is causing them to have trouble getting pregnant and/or sustaining pregnancies.
We also discussed AUTOIMMUNE / BLOOD CLOTTING issues. I put these two broad areas together in one category, because their treatments are similar. Some people have abnormalities with how their blood clots. If the blood clots TOO easily, then the blood supply to the baby will be compromised as the vessels clot up.
Finally, there are HORMONAL issues. This, too, is a general category as there are many different hormonal abnormalities that can affect miscarriage risk. Not every patients should have all these investigated. There are costs and risks associated with every action, so we need to customize the plan according to what’s best for each individual. The following are the specific conclusions we reached and the decisions we made as a result.
ANATOMICAL: Irene’s regular ultrasound exam looked perfectly normal. I performed it myself. This means there are no whopping obvious anatomical problems. However, in order to see more subtle anatomical lesions, one needs to do either an HSG or a saline-contrast ultrasound, tests which involve putting liquid into the uterus in order to see a clearer contrasting view. So should we get one of those tests? It always depends. Irene’s insurance did not cover the test, which can run anywhere from $500 to 1000 dollars or so depending on the part of the country and the specific radiological facility. Our decision to put off this test was based on the fact that we found something else positive. If we had nothing abnormal in any of the other categories, or if her regular ultrasound had been suspicious, or if it was free for her to get an HSG, then she would have more likely chosen to get it.
GENETIC: This category is tested by getting a karyotype on each partner. This is also an expensive test and wasn’t covered by her insurance. The main reason we did not do this test was because there was nothing we could do if the results came back positive. Irene and Harold were opposed to using donor sperm nor donor eggs, in case one of them came back as having a translocation. They also could not afford to do IVF with PGD at this point. Therefore, we decided not to do a karyotype yet.
INFECTIOUS: Instead of testing for a chronic infection, it turns out to be more practical to just give antibiotics to both partners. First of all the cultures are not very sensitive, so it’s possible for someone to have an infection and for the test to wrongly suggest that they are negative for it. Also, the test turns out to be more expensive than the antibiotics. I prescribed doxycycline 100mg twice daily for both partners. The downside is potential stomach upset for both partners and and potential yeast infection for Irene. There is also the bigger ecological downside of introducing more antibiotic resistance to the world’s bacteria. However, Irene and Harold decided there were perfectly fine with this option.
AUTOIMMUNE / BLOOD CLOTTING: We ordered some tests. Specifically, we checked Lupus Anticoagulant and Anti-Cardiolipin Antibodies. There are the two most common tests. There are other ones such as factor V Leiden, Activated Protein C Resistance, a fasting Homocysteine level and Factor II, but for cost reasons, we held off on those for now.
HORMONAL: After reviewing Irene’s history, we did not order any hormonal tests. For example, if she would have admitted to feeling tired or low-energy, I would have checked her thyroid. If she had evidence of PCOS, I would have checked her for insulin resistance. She did not have anything in her history that warranted any other tests. Irene was scheduled to come back and discuss the results with me in two weeks, by which time everything should be back.
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