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The Shettles Method is a child conception idea that is reputed to help determine a baby's sex. It was developed by Landrum B. Shettles in the 1960s and was publicized in the book How to Choose the Sex of Your Baby, coauthored by Shettles and David Rorvik. The book was first published in 1971 and has been in print in various editions ever since.
A full bibliography of Shettles writings is available. [4] He was the developer of gamete intrafallopian transfer (GIFT), a breakthrough in fertility research Shettles developed the Shettles Method of sex selection that helps prospective parents conceive a child of the desired gender. To achieve this end, it utilizes a number of factors that ...
It necessitates the test of surge immunity in electrical or electronic equipment. IEC 61000-4-5 defines test set-up, procedures, and classification levels. In particular, it standardizes the required surge voltage and current waveforms for laboratory testing, with the "1.2/50-8/20 μs" impulse being the most frequently used surge waveform.
For human urinary LH, one IU is defined as 1/189th of an ampule denoted 96/602 and distributed by the NIBSC, corresponding to approximately 0.04656 μg of LH protein for a single IU, but older standard versions are still widely in use. [29] [30] Lateral flow test strip for urine LH, used to predict ovulation
The Whelan method is an "intercourse timing" method that advocates the opposite of the Shettles method. The Whelan method suggests intercourse four to six days prior to ovulation to increase the likelihood of fertilization by male sperm.
The LH secretion most noticeable as a LH surge lasting 48 to 72 hours in the middle of the ovarian cycle. [3] Meiosis in the dominant follicle resumes and follicle ruptures shortly after the LH surge. [27] Ovulation can only occur if GnSAF is absent and the mid-cycle LH surge occurs. [3] [27]
Ovulation occurs about midway through the menstrual cycle, after the follicular phase, and is followed by the luteal phase.Note that ovulation is characterized by a sharp spike in levels of luteinizing hormone (LH) and follicle-stimulating hormone (FSH), resulting from the peak of estrogen levels during the follicular phase.
Only when lactation declines sufficiently to allow generation of a normal preovulatory LH surge to occur will ovulation take place with the formation of a corpus luteum of variable normality. Thus lactation delays the resumption of normal ovarian cyclicity by disrupting but not totally inhibiting, the normal pattern of release of GnRH by the ...