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4realyo:the CBEFM specifically states to use FMU. and you must use within your set window each day. opks ar different.
Ditto! CBEFM you need to use FMU because of the hormones that it tests for. OPK are completely different.
Re: CBEFM: do you prefer to test morning or night?
Ditto! CBEFM you need to use FMU because of the hormones that it tests for. OPK are completely different.