Vickie Nichols Johnson sent me these abstracts when I asked her the same
question.
-Rob

TITLE: Breastfeeding during pregnancy.
 AUTHORS:                       Moscone SR; Moore MJ
 SOURCE:              J Hum Lact 1993 Jun;9(2):83-8
 CITATION IDS:              PMID: 8251083 UI: 94072099
 ABSTRACT:
 Questionnaire data were gathered on the experiences of 57 women who were
 concurrently pregnant and breastfeeding. Respondents provided information
on
nursing and weaning patterns, informational and emotional support, and
pregnancy history. The main reasons given for continued breastfeeding after
conception were the emotional needs of the child or child-led weaning.
Forty-three percent of the children continued to breastfeed throughout the
pregnancy and tandem nurse after the birth. Mothers who initiated weaning
cited breast and/or nipple pain as the principal reason. Most weanings
initiated by the children occurred during the second trimester,
corresponding
with the diminution of breastmilk. The infants born to these mothers were
healthy and appropriate for gestational age.
 MAIN MESH HEADINGS:
                                  *Breast Feeding
                                  *Pregnancy

TITLE: Child growth during weaning depends on whether mother is pregnant
again.
 AUTHORS: Bohler E; Bergstrom S
 AUTHOR AFFILIATION: Department of International Health, Oslo, Norway.
 SOURCE: J Trop Pediatr 1996 Apr;42(2):104-9
 CITATION IDS: PMID: 8984204 UI: 97105333
 ABSTRACT: Few longitudinal studies are available which relate data on
breastfeeding and growth of the last-born child to data on the mother's
subsequent pregnancy. The purpose of the present prospective study from
Bhutan
was to compare growth rate of children weaned during a subsequent pregnancy,
with those of children weaned at the same age, but from non-pregnant
mothers.
Measurements of weight of 113 children and interviews with their mothers
were
done monthly through 32 months during the children's first 3 years of life.
The period of overlap between lactation and pregnancy had a median duration
of
5 months, and increased with an average of one week for each
month reduction in the subsequent birth interval (P< 0.01). Children who
stopped breastfeeding during their mothers' subsequent pregnancy showed a
reduced growth rate during the last months before termination of
breastfeeding
when compared to children weaned at the same age, but from non-pregnant
mothers (P = 0.04), and when compared to children who continued
breastfeeding
(P = 0.06).
 MAIN MESH HEADINGS:
                                 *Body Height
                                 *Body Weight
                                 *Breast Feeding
                                 *Developing Countries
                                 *Weaning

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