when a pregnancy develops to the point that ultrasound could confirm the existence of the pregnancy
, the term becomes clinical pregnancy
. Thus, a chemical pregnancy
is a miscarriage before the fifth week -- or within about week after your missed menstrual period." Given your transfer date, my guess is that they will be dating your pregnancy from about January 15th or 16th or so, as an official first day of last menstrual period. This makes you about 3 weeks 2 days pregnant now.