This is a list I borrowed from our IVF sister Lynzee

Sunshine1576
AC - Assisted Conception
AF - Aunt Flo (periods)
AFAIK - as far as I know
AI - Assisted or Artificial Insemination
AID - Artificial Insemination with Donor Sperm
AIH - Artificial Insemination with husband's or partner's sperm
ART - Assisted Reproductive Technolgy
BBT - Basal Body temperature
BD - baby dancing (sex)
BFN - big fat negative (pregnancy test)
BFP - big fat positive (pregnancy test)
BTW - by the way
BW - blood week (periods)
CC - Controlled Crying
CD - cycle day
CM - cervical mucus
CVS - Chorionic Villus Sampling
DA - dairy allergy
DH, DW, DP, DS, DD, DF, DB, - dear husband, dear wife, dear partner, dear son, dear daughter, dear fianc�, dear boyfriend
DI - Donor Insemination
DPO - days past ovulation
EA - egg allergy
EBM - expressed breastmilk
EP - Ectopic Pregnancy
ER - Egg Retrival
ET - Embryo Transfer
EW or EWCM - Egg White or Egg White Cervical Mucus (description of cervical mucus at ovulation time)
FET - Frozen Embryo Transfer (or fertilised egg transfer)
FSH - Follicle Stimulating Hormone
FYI - for your information
GIFT - Gamete Intrafallopian Transfer
GD - Gestational Diabetes
GYN - gynaecolgist
HPT - home pregnancy test
HTH - hope this helps
ICSI - Intracytoplasmic Sperm Insertion
IUI - Intrauterine Insemination
IVF - In Vitro Fertilisation
LI - lactose intolerance
MIL, FIL, BIL, SIL - mother, father, brother, sister-in-law
M/C - miscarriage
M/S - morning sickness
O - Ovulation
OB - Obstetrician
OHSS - Ovarian Hyper Stimualtion Syndrome
OI - Ovulation Induction
OPK - ovulation predictor test kit
OPU - Ovum (Egg) Pick Up
PA - peanut allergy
PG - pregnant
PCOS - Poly Cystic Ovarian Syndrome
POAS - Pee On A Stick
POF - Premature Ovarian Failure
SAHM - stay at home mum
S/B - Still birth
SD - step daughter
SS - step son
SO - significant other
TIA - thanks in advance
TMI - Too much information
TTC - trying to conceive
U/S - Ultrasound
WAHM - work at home mum
2WW - 2 week wait (wait after ovulation when TTC)