Objective To examine and follow up cervical cytology of pregnant and postpartum women and study their cytopathologic characteristics

so as to determine screening and managing programs for abnormal cervical cytology. Methods Totally 5296 patients in pregnancy and postpartum

in which 3729 by computer-assisted cytology test and 1567 by liquid-based monolayers cytology test

were examined and diagnosed by the Bethesda System made in 2001. Those proven epithelial abnormalities patients were followed up until the lesions regressed to normal. The remaining patients

who exhibited persistent abnormalities or progression

were given further examinations. Results The positive rate of cervical cytological test was 8.72% （462/5296）

including squamous carcinoma （SCA） 1 case（0.02%）

high grade squamous intraepithelial lesion （HSIL） 34 cases（0.64%）

low grade squamous intraepithelial lesion （LSIL） 145 cases（2.74%）

atypical glandular cells （AGC） 5 cases（0.09%）

atypical squamous cells cannot exclude HSIL （ASC-H） 14 cases（0.26%）

atypical squamous cells of undetermined significance （ASC-US） 263 cases（4.97%）. The 419 proven cytological abnormality cases were followed up successfully. The total transnegative rate in three months was 73.74% （309/419）

in which 303 cases （72.32%） persisted normal status for more than six months after regression. And the transnegative rate of ASC-US

ASC-H

AGC

LSIL

and HSIL were 79.56%

64.29%

100%

72.14% and 44.12%

respectively. Forty-six cases received biopsy directed by colposcopy. The distribution of coincidence of cytopathologic and histopathologic diagnosis was: SCA 1 case （100%）

HSIL 10 cases （76.92%）

LSIL 13 cases （65%）

ASC-H 2 cases （50%）

ASC-US 3 cases （37.50%）

total 29 cases （63.04%）. Conclusions We should cast more attention to screening cervix lesions in pregnant and postpartum women. Their cytopathologic characteristics are liable to make the clinician give a false positive diagnosis. So we propose to follow up them closely and to lower the indication of biopsy.