Biomedical subjects

M M van Son

Publications and source records attributed to M M van Son.

5 recordsLinked to original sources

PubMed1999

Low maternal free thyroxine concentrations during early pregnancy are associated with impaired psychomotor development in infancy.

BACKGROUND: Maternal thyroid function during early pregnancy is an important determinant of early fetal brain development because the fetal thyroid is unable to produce any T4 before 12-14 weeks' gestation. Overt maternal hypothyroidism as seen in severe iodine-deficient areas is associated with severely impaired neurological development of the offspring. At present, it is not known whether low free T4 (fT4) levels during pregnancy in healthy women from iodine sufficient areas may affect fetal neurodevelopment. METHODS: Neurodevelopment was assessed at 10 months of age in a cohort of 220 healthy children, born after uncomplicated pregnancies and deliveries, using the Bayley Scales of Infant Development. Maternal TSH, fT4 and TPO antibody status were assessed at 12 and 32 weeks' gestation. Maternal gestational fT4 concentration was defined as an independent parameter for child development. RESULTS: Children of women with fT4 levels below the 5th (< 9.8 pmol/l, n = 11) and 10th (< 10.4 pmol/l, n = 22) percentiles at 12 weeks' gestation had significantly lower scores on the Bayley Psychomotor Developmental Index (PDI) scale at 10 months of age, compared to children of mothers with higher fT4 values (t test, mean difference: 14.1, 95% confidence interval (CI): 5.9-22 and 7.4, 95% CI: 1.1-13.9, respectively). At 32 weeks' gestation, no significant differences were found. In the group of women with the lowest 10th percentile fT4 concentrations at 12 weeks' gestation, a positive correlation was found between the mothers' fT4 concentration and children's PDI scores (linear regression, R: 0.46, P = 0.03). After correction for confounding variables, a fT4 concentration below the 10th percentile at 12 weeks' gestation was a significant risk factor for impaired psychomotor development (RR): 5.8, 95% CI: 1.3-12.6). CONCLUSIONS: Low maternal plasma fT4 concentrations during early pregnancy may be an important risk factor for impaired infant development.

Antibodies↗

PubMed1995

Blues and depression during early puerperium: home versus hospital deliveries.

OBJECTIVE: To investigate whether women who give birth at home are less prone to mood disturbances during the early puerperium than those who give birth in hospital. DESIGN: A prospective study of 303 pregnant women who registered for antenatal care. SETTING: The antenatal clinic at St Joseph's Hospital, Veldhoven, The Netherlands, and five antenatal consultation programmes of local midwives working in the surrounding region. SUBJECTS: Three hundred and eighty-two consecutive caucasian women registering for antenatal care were approached. Of these, 303 consented to participate and 293 completed the study. MAIN OUTCOME MEASURE: The predictor variable was the way in which the women gave birth: spontaneous vaginal parturition at home or in hospital as follows: spontaneously; vaginal parturition after stimulation with medication; vaginal parturition with forceps/vacuum extraction; or caesarean section. The outcome variables were blues and depression. The occurrence of blues was assessed at 4 weeks postpartum, using Pitt's criteria. The occurrence of depression was assessed at 4 weeks postpartum using the Research Diagnostic Criteria. The possible confounding effects of a set of obstetrical and psycho-social variables relating to the early puerperium were investigated using logistic regression analysis. RESULTS: Of the 293 women who completed the study, 52% gave birth at home. Significantly more nullipara gave birth in hospital. Parturition occurred where it had been planned in 77% of women; referral occurred later on in pregnancy in 11% and during labour in 12%. Nullipara had to be referred significantly more often than multipara. In general, there was no difference in the incidence of blues and depression between women who gave birth at home and those who gave birth in hospital. Obstetric factors were not related to the occurrence of blues or depression in the early puerperium. CONCLUSIONS: Women who gave birth in hospital are no more prone to postpartum mood disturbances, such as blues and depression, than women who give birth at home.

Affective Disorders, Psychotic↗

PubMed1995

Maternal thyroid peroxidase antibodies during pregnancy: a marker of impaired child development?

Women with antibodies against the enzyme thyroid peroxidase [TPO-Ab; formerly microsomal antibodies (MsAb)] are at particular risk for developing postpartum thyroid dysfunction; the latter is significantly associated with postpartum depression. Although the negative effect of postpartum maternal depression on child development is well documented, the consequences of elevated titers of TPO-Ab during pregnancy and subsequent postpartum thyroid dysfunction on child development are not known. In a prospective study of a cohort of 293 pregnant women, the occurrence of TPO-Ab during gestation, thyroid dysfunction, and depression was investigated. Five years after delivery, child development was assessed in 230 children of the original cohort using the Dutch translation of the McCarthy Scales of Children's Abilities. Children of women with TPO-Ab during late gestation (n = 19, with normal thyroid function) had significantly lower scores (by t test) on the McCarthy Scales of Children's Abilities than antibody-negative women. The difference on the General Cognitive Scale, which reflects IQ scores, was substantial (10.5 points; t = 2.8; P = 0.005). After correction for possibly confounding variables, maternal TPO-Ab during gestation was found to be the most important factor related to the scores on the General Cognitive Scale (odds ratio = 10.5; 95% confidence interval = 3-34; P = 0.003). We conclude that children of pregnant women who had elevated titers of TPO-Ab but normal thyroid function are at risk for impaired development.

Adult↗

PubMed1993

Microsomal antibodies during gestation in relation to postpartum thyroid dysfunction and depression.

RATIONALE: Microsomal antibodies have been related to postpartum thyroid dysfunction and postpartum depression. OBJECTIVES: To detect the value of microsomal antibodies during gestation in a random population, as a risk factor for thyroid dysfunction and depression during the postpartum period. MAIN FINDINGS: The presence of microsomal antibodies was investigated in a random population of 293 women at 32 weeks' gestation. At the same time, postpartum thyroid function was assessed repeatedly in all women every six weeks up to 34 weeks' postpartum. Postpartum thyroid dysfunction, defined as the presence of abnormal TSH, in combination with abnormal fT4 and/or fT3 values, occurred in 21 women (7.2%) during the postpartum period. Depression was assessed using the Research Diagnostic Criteria without knowing the results of biochemical thyroid function tests. At 32 weeks' gestation there were 27 (9.2%) women with elevated microsomal antibody titres. Compared with microsomal-antibody negative women at 32 weeks' gestation, these women had an RR of 20 for developing postpartum thyroid dysfunction and an RR of 1.7 for developing postpartum depression. CONCLUSIONS: Women with elevated microsomal antibody titres during gestation are particularly at risk for postpartum thyroid dysfunction, but only have a slightly increased risk for postpartum depression.

Antibodies↗

PubMed1993

Prevalence of post partum depression--or is it post-puerperium depression?

In a longitudinal study, the prevalence of post partum depression was investigated in 293 women. They were assessed during gestation at 32 weeks, and consecutively after parturition with an interval of six weeks from four weeks until 34 weeks' post partum. The prevalence of post partum depression (RDC) varied between seven and 14%, with a peak at ten weeks' post partum. It was found that women were depressed significantly more often at ten weeks' post partum compared with pregnancy, the first post partum weeks and the later post partum period. This finding suggests that it is not directly after parturition that women are more prone to depression. The relationship between variables such as blues, parity, PMS and depression showed that at different assessments in the post partum period different women are depressed, women who do not necessarily share the same characteristics. This finding may explain why in some studies a relationship was found between certain kinds of variables and post partum depression while in others not. PMS was found to be significantly related to post partum depression only at the time of the women resumed menstruation. It is suggested that screening on post partum depression partly involves screening on depressive symptoms related to PMS.

Adult↗