Here are some helpful hints for abbreviations I may use throughout my blog...
TTC is Trying to Conceive
2ww    Two Week Wait                or the                Luteal Phase - 14 DPO on average.
AF       Aunt                Flo, menstruation, period 
BBT    Basal                Body Temperature 
BC       Birth Control Pills
BFN    Big                Fat Negative (Result on a HPT)
CD      Cycle                Day 
CM     Cervical                Mucus 
CP      Cervical                Position
DPO   Days                Past Ovulation 
EC      Embryo                Cyro/Freezing 
EDD   Estimated                Due Date 
FSH    Follicle Stimulating Hormone
hCG    Human                Chorionic Gonadotropin - detected by HPTs 
HPT    Home Pregnancy Test 
HSG    Hysterosalpingogram                - x-ray 
IUI       Intrauterine                Insemination 
IVF      In                Vitro Fertilization 
LH       Luteinizing                Hormone - detected in OPKs 
LP        Luteal Phase, days between ov & AF 
MFI     Male Fertility Issues
OPK    Ovulation                Predictor Kit 
RE       Reproductive                Endocronolgist - doctor who specializes in fertility problems 
SA       Semen                Analysis