• measure Pregnancy Problems

    Study:Netherlands Twin Register
    Mode of collection: SelfAdministeredQuestionnaire
    Available measurements:
    Young Netherlands Twin Register  YS_1 YC_DSC YC_ADHMRI YS_TRIP age 1-2
     
    0
    5
    10
    15
    20
    25
    30
    years
    Problems during the pregnancy were assessed, such as eclampsia, iron deficiency, or twin-to-twin transfusion syndrome (TTTS).
    Created October 17, 2024 • Updated October 20, 2024

  • measure Urinary osmolality

    Study:Netherlands Twin Register
    Mode of collection: MeasurementsAndTests    Biological sample/measurement
    Available measurements:
    Young Netherlands Twin Register  YC_ACTION BB1_1 YC_ACTION BB1_2 YC_ACTION BB2 YC_ACTION - BB3
     
    0
    5
    10
    15
    20
    25
    30
    years
    Urinary osmolality was measured with a density test (specific gravity) using the Atago refractometer PAL-10S BLT/A+W (Atago, Tokyo, Japan). The refractive index is a ratio of the velocity of light in air to the velocity of light in solution, which is directly proportional to the number of dissolved solids in urine.
    Created October 17, 2024 • Updated October 20, 2024

  • measure Buccal swab

    Study:Netherlands Twin Register
    Mode of collection: MeasurementsAndTests    Biological sample/measurement
    Available measurements:
    Young Netherlands Twin Register  YC_ACTION BB1_1 YC_ACTION BB1_2 YC_ACTION BB2 YC_ACTION - BB3 YC_BS1 YC_BS2 YC_BS3 YC_DSC YE_FITNSS YE_ATTEF1 YE_ATTEF2 YE_ATTEF3 YC_ADHMRI YE_COG18
     
    0
    5
    10
    15
    20
    25
    30
    years
    Buccal swabs are collections of buccal cell scrapings obtained by rubbing buds along the inside of the mouth.
    Created October 17, 2024 • Updated October 20, 2024

  • measure Handedness and hand preference

    Study:Netherlands Twin Register
    Mode of collection: SelfAdministeredQuestionnaire
    Available measurements:
    Young Netherlands Twin Register  YS_2 YS_DHBQP YS_DHBQ14 YS_DHBQ16 YS_DHBQ18 YC_BS1 YC_BS2 YE_FITNSS YE_ATTEF1 YE_ATTEF2 YE_ATTEF3 YC_ADHMRI YE_COG12 YE_COG18 YS_TRIP age 2 YS_TRIP age 1-2
     
    0
    5
    10
    15
    20
    25
    30
    years
    Self-reported handedness or hand preference of self or family members was assessed.
    Created October 17, 2024 • Updated October 20, 2024

  • measure Pregnancy Duration and Birth

    Study:Netherlands Twin Register
    Mode of collection: SelfAdministeredQuestionnaire
    Available measurements:
    Young Netherlands Twin Register  YS_1 YC_DSC YC_ADHMRI YE_COG18 YS_TRIP age 1 YS_TRIP age 1-2
     
    0
    5
    10
    15
    20
    25
    30
    years
    Pregnancy Duration and Birth assesses the duration of the pregnancy from conception to birth, and the labor process, e.g., were the children born on time, prematurely or late; time between birth of the children; manner of birth (e.g., vaginal, cesarean), position of the children in the uterus before birth; and the course of the delivery.
    Created October 17, 2024 • Updated October 20, 2024

  • measure Family Situation

    Study:Netherlands Twin Register
    Mode of collection: SelfAdministeredQuestionnaire
    Available measurements:
    Young Netherlands Twin Register  YS_2 YS_3 YS_5 YS_7 YS_10 YS_12 YS_DHBQP YS_DHBQ14 YS_DHBQ16 YS_DHBQ18 YC_BS2 YE_COG18 YS_TRIP age 1-2 YS_TRIP age 3 YS_TRIP age 4 YS_TRIP age 5 YS_TRIP age 7 YS_TRIP age 10 YS_TRIP age 12
     
    0
    5
    10
    15
    20
    25
    30
    years
    Family situation assesses information about the family and living situation, such as divorce or death of (a) parent(s), co-habition and co-parenting.
    Created October 17, 2024 • Updated October 20, 2024

  • measure Substance Use

    Study:Netherlands Twin Register
    Mode of collection: SelfAdministeredQuestionnaire
    Available measurements:
    Young Netherlands Twin Register  YS_1 YS_2 YS_3 YS_5 YS_7 YS_10 YS_12 YS_DHBQP YS_DHBQ14 YS_DHBQ16 YS_DHBQ18 YC_BS2 YC_BS3 YE_FITNSS YE_COG18 YS_TRIP age 1 YS_TRIP age 2 YS_TRIP age 1-2
     
    0
    5
    10
    15
    20
    25
    30
    years
    Substance use was assessed, including tabacco, alcohol, and (recreational) drugs.
    Created October 17, 2024 • Updated October 20, 2024

  • measure LC-MS amines

    Study:Netherlands Twin Register
    Mode of collection: MeasurementsAndTests    Biological sample/measurement
    Available measurements:
    Young Netherlands Twin Register  YC_ACTION BB1_1 YC_ACTION BB1_2 YC_ACTION BB2 YC_ACTION - BB3
     
    0
    5
    10
    15
    20
    25
    30
    years
    Liquid chromatography mass spectrometry (LC-MS) platform targeting amines.
    Created October 17, 2024 • Updated October 20, 2024

  • measure Neuropeptides

    Study:Netherlands Twin Register
    Mode of collection: MeasurementsAndTests    Biological sample/measurement
    Available measurements:
    Young Netherlands Twin Register  YC_ACTION BB1_1 YC_ACTION BB1_2 YC_ACTION BB2 YC_ACTION - BB3
     
    0
    5
    10
    15
    20
    25
    30
    years
    Neuropeptides, including Substance P, Beta-endorphin, Dynorphin A, neurotensin, and Leu-enkaphalin, were measured with traditional enzymatic tests, such as Enzyme-Linked Immunosorbent Assays (ELISA).
    Created October 17, 2024 • Updated October 20, 2024

  • measure Supplement use

    Study:Netherlands Twin Register
    Mode of collection: SelfAdministeredQuestionnaire
    Available measurements:
    Young Netherlands Twin Register  YS_1 YC_ACTION BB2 YC_ACTION - BB3 YE_COG18 YS_TRIP age 1 YS_TRIP age 1-2
     
    0
    5
    10
    15
    20
    25
    30
    years
    Nutritional supplement use was assessed in mothers during pregnancy, and vitamin supplementation use was assessed for children, including formation regarding type, frequency, and duration of vitamin supplementation.
    Created October 17, 2024 • Updated October 20, 2024

  • measure Genotyping (array)

    Study:Netherlands Twin Register
    Mode of collection: MeasurementsAndTests    Biological sample/measurement
    Available measurements:
    Young Netherlands Twin Register  YC_ACTION BB1_1 YC_ACTION BB1_2 YC_ACTION BB2 YC_ACTION - BB3 YC_BS1 YC_BS2 YC_BS3 YC_DSC YE_FITNSS YC_ADHMRI YE_COG18
     
    0
    5
    10
    15
    20
    25
    30
    years
    Assessment of single nucleotide polymorphisms (SNPs) as obtained through genotyping arrays.
    Created October 17, 2024 • Updated October 20, 2024

  • measure Contraception Use

    Study:Netherlands Twin Register
    Mode of collection: SelfAdministeredQuestionnaire
    Available measurements:
    Young Netherlands Twin Register  YS_1 YS_DHBQ14 YS_DHBQ16 YS_DHBQ18 YC_BS2 YC_BS3 YE_FITNSS YE_COG18 YS_TRIP age 1 YS_TRIP age 1-2
     
    0
    5
    10
    15
    20
    25
    30
    years
    Contraception use assesses the use of hormonal preparations, such as the contraceptive pill. Questions typically include whether the respondent has used or uses contraceptives prior to pregnancy or at this moment, and in some cases, for how long they have used it, and which type of contraceptive.
    Created October 17, 2024 • Updated October 20, 2024

  • measure Child care

    Study:Netherlands Twin Register
    Mode of collection: SelfAdministeredQuestionnaire
    Available measurements:
    Young Netherlands Twin Register  YS_1 YS_2 YS_3 YS_5 YS_7 YS_10 YS_12 YC_BS2 YS_TRIP age 1-2 YS_TRIP age 3 YS_TRIP age 5
     
    0
    5
    10
    15
    20
    25
    30
    years
    Childcare comprises of questions about pre-school, after-school and out-of school care.
    Created October 17, 2024 • Updated October 20, 2024

  • measure Medication Use

    Study:Netherlands Twin Register
    Mode of collection: SelfAdministeredQuestionnaire
    Available measurements:
    Young Netherlands Twin Register  YS_1 YS_2 YS_3 YS_5 YS_7 YS_10 YS_12 YS_DHBQP YS_DHBQ14 YS_DHBQ16 YS_DHBQ18 YC_ACTION BB2 YC_ACTION - BB3 YC_BS1 YC_BS2 YC_BS3 YC_DSC YE_FITNSS YE_ATTEF2 YC_ADHMRI YE_COG18 YS_TRIP age 1 YS_TRIP age 2 YS_TRIP age 1-2 YS_TRIP age 3 YS_TRIP age 5
     
    0
    5
    10
    15
    20
    25
    30
    years
    Medication use assesses, among others, dosage, duration, and ATC code of any medications used, if available.
    Created October 17, 2024 • Updated October 20, 2024

  • measure LC-MS steroid hormones

    Study:Netherlands Twin Register
    Mode of collection: MeasurementsAndTests    Biological sample/measurement
    Available measurements:
    Young Netherlands Twin Register  YC_ACTION BB2 YC_ACTION - BB3 YC_BS1
     
    0
    5
    10
    15
    20
    25
    30
    years
    Liquid chromatography mass spectrometry (LC-MS) platform targeting steroid hormones.
    Created October 17, 2024 • Updated October 20, 2024

  • measure Temperament Questions

    Study:Netherlands Twin Register
    Mode of collection: SelfAdministeredQuestionnaire
    Available measurements:
    Young Netherlands Twin Register  YS_2 YS_TRIP age 2 YS_TRIP age 1-2
     
    0
    5
    10
    15
    20
    25
    30
    years
    Temperament questions assess temperament in the children, including crying without a clear cause, and being upset after a disruption of the daily routine.
    Created October 17, 2024 • Updated October 20, 2024

  • measure Diet during pregnancy

    Study:Netherlands Twin Register
    Mode of collection: SelfAdministeredQuestionnaire
    Available measurements:
    Young Netherlands Twin Register  YS_1 YS_TRIP age 1-2
     
    0
    5
    10
    15
    20
    25
    30
    years
    Diet during pregnancy asks mothers whether they have eaten eggs, dairy products, soy products, fish, and meat during their pregnancy, and whether they followed a vegetarian diet during pregnancy.
    Created October 17, 2024 • Updated October 20, 2024

  • measure GC-MS organic acids

    Study:Netherlands Twin Register
    Mode of collection: MeasurementsAndTests    Biological sample/measurement
    Available measurements:
    Young Netherlands Twin Register  YC_ACTION BB1_1 YC_ACTION BB1_2 YC_ACTION BB2 YC_ACTION - BB3
     
    0
    5
    10
    15
    20
    25
    30
    years
    Gas chromatography mass spectrometry (GC-MS) platform targeting organic acids.
    Created October 17, 2024 • Updated October 20, 2024

  • measure Health problems and treatments

    Study:Netherlands Twin Register
    Mode of collection: SelfAdministeredQuestionnaire
    Available measurements:
    Young Netherlands Twin Register  YS_1 YS_2 YS_3 YS_5 YS_TRF5 YS_7 YS_TRF7 YS_10 YS_TRF10 YS_12 YS_TRF12 YS_DHBQP YS_DHBQ14 YS_DHBQ16 YS_DHBQ18 YC_ACTION BB2 YC_ACTION - BB3 YC_BS1 YC_BS2 YC_DSC YE_FITNSS YE_ATTEF2 YC_ADHMRI YE_COG12 YE_COG18 YS_TRIP age 1 YS_TRIP age 2 YS_TRIP age 1-2 YS_TRIP age 3 YS_TRIP age 4 YS_TRIP age 5 YS_TRIP age 7 YS_TRIP age 10 YS_TRIP age 12
     
    0
    5
    10
    15
    20
    25
    30
    years
    Health problems and treatments contains questions about health problems, diseases and disorders, including handicaps, treatments (also for mental health problems) and hospitalization.
    Created October 17, 2024 • Updated October 20, 2024

  • measure Breastfeeding

    Study:Netherlands Twin Register
    Mode of collection: SelfAdministeredQuestionnaire
    Available measurements:
    Young Netherlands Twin Register  YS_2 YS_TRIP age 2 YS_TRIP age 1-2
     
    0
    5
    10
    15
    20
    25
    30
    years
    Breastfeeding was assessed through the question: Did the twin get breastfeeding?
    Created October 17, 2024 • Updated October 20, 2024
You can also access this registry using the API (see API Docs).