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This section provides you with helpful information about the women's body that you should know.
The FAM provide couples with information they need to identify the most fertile days of the cycle. They rely on a woman's understanding and recognition of her fertility.
No, is not. There are a lot of women that report having confusing cervical mucus or erratic basal body temperatures which makes it difficult. Luckily, there are new technological approaches that are easier, more effective and cheaper(1). Thus, ovulation test strips are an excellent tool that can help women identifying ovulation.
There are a few given by the variability in the Luteinizing Hormone (LH) secretion during the cycle(2). For example: breastfeeding, very long anovulatiory cycles, extremely short LH surges and premenopause.
No. An study has demonstrated that they are extremely variable in configuration, amplitude and duration(2). Although they are classically described as a single peak, they can also be a double-peak or a plateau.
The image shows 8 examples of different LH surges types:
According to the study made with 281 cycles(2), the proportions of single-peaked, plateauing, double-peaked, and multiple-peaked LH surges were 134 (48%), 30 (11%), 93 (33%), and 24 (8%), respectively.
In general, yes. According to the study made by Direito A et al., the LH surge characteristics remain consistent showing a significant repetition of the same pattern of LH profile within the same woman.
No, in the image below you can see an example of it. Figures A, B and C show cycles where the ovulation took place at the onset of the LH surge, the same day as the LH peak, and 2 days later, respectively. In figure D, a multiple-peak surge, the last peak occurs 2 days after ovulation.
(1) Ecochard R, Leiva R, Bouchard T, et al. Use of urinary pregnadeniol 3-glucuronide to confirm ovulation.
(2) Direito A, Bailly S, Mariani A, Ecochard R. Relationships between the luteinizing hormone surge and other characteristics of the menstrual cycle in normally ovulating women.