Questionnaires were administered by trained research staff to collect demographic, life style (e.g. smoking and alcohol), medical history, use of natural health products and medications, and potential sources of exposure data.

Blood pressure, height, weight and a proteinuria test were taken.

Urine and blood samples were collected. Under a separate consent form, additional biospecimens were collected to be stored in the MIREC Data and Biological Specimens Bank (MIREC Biobank).

A questionnaires was administered by trained research staff to collect use of medications data. A validated food frequency questionnaire was administered.

Blood pressure, weight and a proteinuria test were taken.

Urine and blood samples were collected. Under a separate consent form, additional biospecimens were collected to be stored in the MIREC Data and Biological Specimens Bank (MIREC Biobank).

Questionnaires were administered by trained research staff to collect demographic, life style (e.g. smoking and alcohol), use of medications, and potential sources of exposure data.

Blood pressure, weight and a proteinuria test were taken.

Urine and blood samples were collected. Under a separate consent form, additional biospecimens were collected to be stored in the MIREC Data and Biological Specimens Bank (MIREC Biobank).

Urine and blood samples were collected. Under a separate consent form, additional biospecimens were collected to be stored in the MIREC Data and Biological Specimens Bank (MIREC Biobank).

Medical chart review information was extracted.

Questionnaires were administered by trained research staff at participant's home to collect home environment, use of natural health products, mother diet and baby's diet, sunlight exposure, hair treatments, postnatal smoking and alcohol use, and breastfeeding data. A validated food frequency questionnaire was administered as well.

Hair and breastmilk samples were collected.

Questionnaires were administered by trained research staff to collect demographic, lifestyle (e.g. postnatal smoking and alcohol, breastfeeding), life events, potential sources of exposure data. Psychosocial factors and maternal stress were assessed with a questionnaire.

Through a questionnaire, information was collected about the relationship with their baby, how they felt, the relationship with partner, and adult life.

Through a questionnaire, information was collected about the relationship with their baby, occupation, household, level of stress and well-being, the relationship with partner, and life events.

Anthropometric measurements were taken.

Through a questionnaire, information is collected about her health, her pubertal history, smoking habits, demographic status, family structure, level of stress and well-being.

Anthropometric measurements were taken.

Blood samples were collected.

Cord blood and meconium samples were collected

Sexual development was assessed through a genital clinical exam, pigmentation of the areolar and scrotum skin tests.

Weight, length, head and right arm circumferences, back and arm skinfold thickness were measured.

Blood and vaginal cells samples were collected.

An interview with the mother collected information about child’s use of vitamins and medications, sleep behavior, general development, health and hospitalization, child care, as well as neighbourhood and financial support. A mother self-administered questionnaire was done, to collect information on mother-child relationship, child’s behaviour, mother’s feelings, relationship with partner and life events.

Child's weight, length and crown-rump length, right arm circumference, arm and back skinfold thickness, sexual development, neurobehavioral/sensory development, blood pressure, heart rate variability, as well as visual and auditory functions. An arm restraint test was performed to evaluate the baby’s frustration behaviours and coping strategies.

Medical chart information on infant birth was also extracted.

At age 3, child neurobehaviour; particularly language and behavior (BRIEF-P) were assessed.

Anthropometric measurements such as weight, height, waist-hip and head circumference, back skin fold, right arm skin fold, and digit length were taken.

Blood and urine samples were collected as well.

A series of questions on the development of the child, including behaviour and language, communications and language skills are collected in the mother's self-administered questionnaire. The questionnaire also entails general questions on daycare and on the child's health.

A home inventory was also completed where they collected information about learning material, language stimulation, physical environment, responsivity, academic stimulation, modeling, variety, acceptance of negative behaviour.

Intellectual, attention and executive functioning, social impairment of the child were evaluated by standardized tests.

Anthropometric measurements such as weight, height, and head circumference were taken if not already taken during the biomonitoring visit or if taken over 6 months ago.

Blood and urine samples were collected as well.

A series of questions on the development of the child, including behaviour, communications and language skills are collected in the mother's questionnaires. Questions on the child's health, puberty onset, sociodemographic, bullying and sleep patterns are asked. Puberty assessment is done using the TANNER staging scale, as well as a self-assessment. Online dietary assessments are completed.

Physical activity and sleep pattern measurement is evaluated, using an accelerometer.

Teeth, blood, saliva and urine samples were collected as well.

Questionnaires were administered by trained research staff to collect demographic data.