<the initial secretion of lactose in urine (which reflects
>the ability of the breast to synthesize milk components) >>

Is there a secretion of lactose in tears as well  (the other womanly body
secretion)?
Beadie Cambardella
Atlanta , GA

-----Original Message-----
From: Cathy Fetherston <[log in to unmask]>
Date: Thursday, July 18, 2002 11:11 PM
Subject: lactogenesis after fetal death


>On 19/7/02 3:27 AM, "Automatic digest processor"
><[log in to unmask]> wrote:
>
>> At what point in
>> gestation, that if the pregnancy ends and delivery occurs, ie stillbirth,
>> does lactation occur.
>
>One study showed the initial secretion of lactose in urine (which reflects
>the ability of the breast to synthesize milk components) occurs between  15
>to 20 weeks gestation (with some as early as 10 weeks). Increase in lactose
>excretion also correlates with an increase in blood prolactin at this time.
>So this is termed the general time of Onset of lactogenesis I (obviously a
>wide variation). Lactogenesis II onset is then triggered by delivery of the
>placenta.
>Arthur, P. et al. 1991. Lactose in Blood in non pregnant,  pregnant and
>lactating women. J Pediatr Gastoent Nutrit. 13: 254-259.
>
>Another study found rate of lactose excretion was significantly  higher by
>22 weeks than before 12 weeks gestation. There was a further significant
>increase  at 28 weeks.
>There was however a large variation  with one women having no breast growth
>during pregnancy and minimal lactose excretion, but then had a normal
>increase near and after term.
>
>Cox et al.1999. Breast growth and the urinary excretion of lactose during
>human pregnancy and early lactation: endocrine relationships.
>Exp Physiolog. 84: 421-434.
>
>So the short answer is - can be as early as 10-15 weeks, although the
>average seems to be 15-22 weeks.
>
>Cathy Fetherston
>Perth, Western Australia
>
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