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Clearblue Fertility Monitor
At $200 to $250 per monitor, plus about $50 for test sticks, this is the BMW of ovulation predictor methods. It tests two hormones, estrogen metabolite and LH, to determine your peak fertility days. You simply urinate on a stick every morning starting at day six or nine of your cycle, then place the stick in the monitor for a reading of high, low or peak fertility. "It's very reliable, just more expensive than an OPK," says Dr. Williams.
Pros: It's very reliable and pinpoints your most fertile days.
Cons: It's expensive and, according to Dr. Williams, not accurate for women who have cycles longer than 35 days.
Testimonial: "I had tried other methods and was not having any luck. To me, it was well worth the cost to speed up the process. It was easy to use, and I got pregnant — with twins — after four months." -- Marla