These are the only ones I can think of right now.
af - aunt flow/period
bd - "the deed"/sex
dh - dear husband
df - dear fiance
bf - boyfriend/breast feed
ds - darling son
dd - darling daughter
cm - cervical mucus
opk - ovulation prediction kit
hpt - home pregnancy test
pg - pregnant/pregnancy
pgt - pregnancy test
bfp - big fat positive
bfn - big fat negative
fmu - first morning urine