Medications Used Commonly in Fertility Treatments.
Clomiphene Citrate (Clomid) is a compound that is very similar in structure to estrogen. Because of this likeness, Clomid is able to bind to estrogen receptors in the hypothalamus (a part of the brain that regulates ovulation). This prevents the brain from seeing the negative signal from estrogen that is being released by the ovaries. As a result, the hypothalamus continues to stimulate the pituitary gland to make FSH and LH. These hormones stimulate follicular growth in the ovary.
Clomiphene citrate is administered orally in 50 mg increments (50, 100, 150) over 5 days. There are 2 common regimens for administration. Using the first day of menses as cycle day 1, Clomid is taken on days 3-7 or days 5-9. If follicular monitoring is used, an ultrasound is usually done on day 10 (if taken on days 3-7) or day 12 (if 5-9). The actual release of the follicle using HCG is timed when the follicles reach optimal size.
Pregnancy rates with Clomid range from 6-10% in most cases. Of the pregnancies that occur using Clomid, 85% will occur in 3 months. 99% will occur within 5 months. Treatment beyond 5 months is generally not seen as useful. There are various other medications that can be used with Clomiphene citrate. Among these are glucocorticoids like dexamethasone, naltrexone, avandia, and metformin.
Gonadotropins are hormone medications to make the ovary produce extra follicles. Gonadotropins include follicle stimulating hormone (FSH) and lutenizing hormone (LH). There are several different brand names of medications available. Some of the more common ones include: Follistim, Repronex, Bravelle, Menopur, and Gonal-F. These shots must be used under the supervision of a doctor to prevent harmful side effects such as ovarian hyperstimulation (OHSS). Detailed mixing and administration instructions are provided in the clinic. More information about injectable medications used for infertility treatments such as Follistim, Gonal-F, Menopur, Repronex, and Bravelle can be found here.
Lupron (leuprolide acetate) is an injectable medication administered just below the skin (subcutaneously or SQ). It is a gonadotropin releasing hormone (GnRH) agonist which means it should stimulate the release of FSH and LH from the pituitary gland. What is seen, in actuality, is a paradoxical effect. After an initial stimulation of gonadotropin release, Lupron actually prevents release of FSH and LH. This is the desired clinical application of Lupron in an ovarian stimulation cycle. By preventing the pituitary gland from stimulating the ovaries with FSH, and preventing LH from triggering ovulation, the ovaries are effectively "turned off". This allows your physician to control the amount of ovarian stimulation by the amount of medication you inject. Ovulation is also not likely without the surge of LH that is also blocked by Lupron. When the follicles are ready, ovulation can be triggered by giving HCG which has structural similarities to LH. After ovulation has been triggered there is no further need to continue Lupron.
Side effects you may experience while taking Lupron include hot flashes, vaginal dryness, and headaches. If these side effects occur they will usually resolve after you start taking gonadotropins.
Lupron is usually overlapped with birth control pills to help coordinate the treatment cycle and synchronize the growth of follicles. The usual starting dose for Lupron is 10 units (0.1cc). Once you start your gonadotropins, you will decrease your lupron dose to 5 units (0.05cc). There are other lupron protocols such as the lupron flare so be sure to follow your directions that are individually assigned to you.
These medications directly block the effect of brain's stimulation of the pituitary gland. They can usually be taken for a shorter duration than Lupron. Great care must be taken to avoid accidental ovulation and timing of the medication is crucial. When used properly, these medications can provide equal prevention of ovulation as Lupron. Pregnancy rates are fairly equivalent for between the agonists and antagonists.
HCG has a chemical structure that is very similar to LH (luteinizing hormone) which triggers ovulation. HCG is also the hormone produced by pregnancies from the chorionic villi and placenta. A pregnancy test is essentially a test for the presence of HCG. HCG can be used to trigger ovulation at the appropriate time when your follicles are ready. You will be instructed on a time to take HCG. This is often referred to as "release" as it refers to the release of the egg from the wall of the follicle. The type of cycle and day of the procedure (oocyte retrieval or insemination) will determine what time the HCG injection will be given. Once HCG is given there will be no further Lupron or gonadotropin injections.
Progesterone is produced by the corpus luteum in the ovary after ovulation. During the retrieval process some of the hormone producing cells are removed from the inside of the follicles. As an attempt to support the lining of the uterus and prepare for implantation, supplemental HCG or progesterone is usually used. This supplemental HCG can further stimulate hormone production in the ovary and worsen the symptoms of ovarian hyperstimulation. To avoid this undesired effect progesterone can be administered. There are several forms of progesterone available including vaginal suppositories, and injectable progesterone. Progesterone injections are usually continued until 10-12 weeks of pregnancy. The oil that holds the progesterone can make the shots uncomfortable. There are several tips that may help with your progesterone injections. Click for more information.
Metformin is an insulin sensitizing medication used to counteract the effect of high circulating insulin levels (hyperinsulinemia). This elevated insulin level has been associated with many diseases including PCOS and insulin resistance. Metformin use has been associated with improved ovulation, weight loss, and decreased pregnancy losses. Common side effects include nausea, bloating, and diarrhea. Metformin is much more effective when combined with a diet aimed at reducing insulin stimulation and a regular exercise program. Dr. Zeringue specializes in working with insulin resistance and metformin. This experience is passed on to individual patients through education sessions designed to help people understand the underlying disorder. [More Information]
Vitamin supplementation has long been recommended in women attempting to conceive. You may use over the counter vitamins or prenatal vitamins as long as they contain 1mg of folic acid. If you eat a well balanced diet you may prefer to take only the folic acid which is available in 1mg amounts. Some women may need to take 4mg of folic acid based on certain risk factors. Consult your physician to find out which dose is right for you. Proper supplementation can significantly reduce the risk of neural tube defects.
Supplements to Help Sperm
Many products are being advertised with the promise of helping sperm and improving pregnancy. Unfortunately, most of these claims are not back up by reputable data. There is a trend towards improvement with some of the anti-oxidant treatments but it is still too early to draw any firm conclusions. Some clinics are starting to use "Fertility Blend" more frequently. Caution should be used with all supplements as they are not regulated by the FDA and may contain ingredients which can actually hinder your efforts!
Any substance labeled as "Dietary Supplement" is not regulated by the FDA. These supplements can contain all types of ingredients and do not have to have any proven effect. Unfortunately, the herbal industry is supported by billions of dollars and the advertising can be quite convincing. While there are likely some legitimate herbal supplements available, we encourage you to refrain from using them at this time. Some of these supplements may actually interfere with your fertility efforts. As more evidence is accumulated, fertility clinics will certainly embrace the help of anything that has a proven benefit. Many current medications are derived from herbs and natural compounds. After years of research they become labeled as medications and receive FDA approval. Your safety and success may be at stake.