This section of a post from yesterday's lactnet jumped out at me:

< Fertility takes longer to return the more frequently a woman breastfeeds
each day.  It also is delayed if she and her baby sleep in the same bed.
    In addition to tracking feeding patterns and pinpointing when
menstruation returns in new mothers, researchers also are developing hormone
profiles on participants.  The pattern of estrogen and progesterone levels
can indicate when a woman ovulates.    He traces the hormone levels from
filter paper squares that the women dip in their urine . >

Would it be a stupid question to ask the researcher if they are

A) doing the urine hormone testing from right before delivery to
immediately post partum?
B) Are they seeing the corresponding drop in progesterone levels after the
delivery of the placenta?
C) Do they see any women whose levels of progesterone stay higher-- with
any corresponding difficulties in initiation of milk supply?
D)  Would any of this be helpful in tracking what exactly DOES happen to
levels of hormones (wouldn't it be lovely if there were a urine test for
prolactin?) as milk supply becomes established?

What do you all think?

Karen Foard, IBCLC
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President, PA-MILC Breastfeeding: Perfectly Normal