However, complete hydatidiform
mole is possibly associated with advanced maternal age
and the use of assisted reproductive techniques, and this
reflects how difficult the decision of termination is for
such couples [3]. Our case report represents one such
patient who conceived after a relatively long period of
infertility and repeated medical trials for conception. In
this article, we report a case of second trimester twin
pregnancy with a huge complete hydatidiform mole that
was managed conservatively according to our patient’s
request and circumstances. We also discuss the falsely
low b human chorionic gonadotropin (hCG) results that
were revealed during follow-up in what is known as the
‘hook effect’. The hook effect is another interesting phenomenon
that should be considered in patients