You can run a medline or google scholar search on the keywords "cervical
carcinoma in situ and breastfeeding". Here's a few things that I found
doing a google scholar search. These two particular articles are old,
but I found nothing more recent to contradict them.
Catherine Watson Genna, IBCLC NYC
----------------------------------
REDUCED RISK IN WOMEN WHO BF:
Med J Aust. 1989 Feb 6;150(3):125-30. Links
Sexual, reproductive and contraceptive risk factors for
carcinoma-in-situ of the uterine cervix in Sydney.
* Brock KE,
* Berry G,
* Brinton LA,
* Kerr C,
* MacLennan R,
* Mock PA,
* Shearman RP.
University of Sydney, NSW.
Sexual, reproductive and contraceptive risk factors were
investigated in a matched community-based case-control study of
carcinoma-in-situ of the uterine cervix in Sydney. The risk was related
strongly to the number of sexual partners: women who had had seven or
more sexual partners in a lifetime had a six-fold increased risk
compared with those with one or no partner. Early age at first sexual
intercourse was also a risk factor, but this effect was reduced
substantially after adjustment for the number of partners, with only a
two-fold excess risk persisting for those with first intercourse before
the age of 16 years as compared with those whose first sexual
intercourse was at the age of 25 years or later. The long-term use of
oral contraceptive agents was associated with an elevated risk (relative
risk, 2.3 for more than six years of use); this effect was maintained
for both oestrogen and progestogen doses. The risk increased with the
number of induced abortions that had been undergone (relative risk, 2.2
for two or more abortions), but this effect was not statistically
significant. A protective effect was found for women who had had a tubal
ligation, for those who practised the rhythm method of birth control,
and for women who breastfed. It is possible that these reduced risks may
relate to unmeasured variables of life-style.
PIP: The extent to which sexual, reproductive, and contraceptive
factors are associated with an increased risk of in situ cervical cancer
was investigated in 117 Australian women with newly diagnosed cervical
intraepithelial neoplasia type 3 and 196 matched controls. The risk of
carcinoma in situ of the uterine cervix was found to increase from 4.5
for women with 2-3 sexual partners to 8.1 for those with 7 or more
partners when compared to the risk for women with 1 or 0 partners. When
these effects were adjusted for the other known risk factors of
carcinoma in situ--age at 1st sexual intercourse, the duration of oral
contraceptive (OC) use, and smoking--women who reported 2-3 sexual
partners had an adjusted risk of 3.2, those with 4-6 partners had an
adjusted relative risk of 4.2, and those with 7 or more had an adjusted
risk of 6.3 compared to women with 1 or 0 partners. The effect of early
age at 1st intercourse on the risk of carcinoma in situ was reduced
substantially after adjustment for the number of sexual partners, with
only a 2-fold excess risk persisting for those with 1st intercourse
before the age of 16 years compared with those whose 1st intercourse
occurred at 25 years of age or later. Longterm OC users were also found
to be at increased risk of carcinoma in situ. Women with more than 6
years of OC use had an adjusted relative risk of 2.3 compared with never
users. There were also increasing risks with increasing lifetime dosages
of estrogen and progestogen. Risk increased to 2.2 for women who had
undergone 2 or more abortions compared with women who had never had an
abortion, but this effect was not statistically significant. Finally, a
protective effect against carcinoma in situ of the uterine cervix was
found among women who had undergone tubal ligation, those who utilized
the rhythm method of fertility control, and women who breastfed;
however, these reduced risks may be related to unmeasured life-style
variables. No relationship was noted between the risk of carcinoma in
situ and age at menarche, number of pregnancies, the age at 1st live
birth, or the age at 1st breastfeeding.
PMID: 2716580 [PubMed - indexed for MEDLINE]
------------------------------------------
"There was no correlation between cervical cancer and breastfeeding..."
Risk factors of female cancers in ragusa population (sicily) - I.
Endometrium and cervix uteri cancers
Journal European Journal of Epidemiology
Publisher Springer Netherlands
ISSN 0393-2990 (Print) 1573-7284 (Online)
Issue Volume 5, Number 3 / September, 1989
DOI 10.1007/BF00144839
Pages 363-371
Subject Collection Medicine
SpringerLink Date Thursday, November 04, 2004
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