Most also examine exposure windows spanning a month or a trimester in length, which may mask temporal variability.
In addition, we classified women as either being in the first trimester of pregnancy (≤91 days) on 11 September or being in a later trimester, based on their gestational age at delivery.
They had a previous child with free trisomy for chromosome 21 [Down syndrome] and her second pregnancy ended in a first trimester miscarriage.
The new law will prohibit doctors in Kansas from using forceps, clamps, or other tools to remove a fetus's parts in a second-trimester abortion unless the woman's life is in danger.
Mothers' educational level, smoking status, alcohol intake, parity, ethnicity, pre-pregnancy weight, past history of miscarriage, long-term chronic illness and vegetarian diet were self-reported in a first-trimester questionnaire.
Infants whose mothers had low serum pregnancy-associated plasma protein-A (PAPP-A) in the first trimester were observed to have intrauterine growth retardation.
The study showed that an increase in trimester had a corresponding increase with distribution of the infection.
Three study groups were assembled: women prescribed statins in the first trimester (group A), fibrate/nicotinic acid in the first trimester (group B) and statins between 1 year and 1 month before conception, but not during pregnancy (group C).
Six (18.7%) of the overall 32 MS patients had a relapse during pregnancy, prevailing in the first trimester; a single patients relapsed twice, in the first and in the third trimester respectively.
Most miscarriages occur in the first trimester, a large number in the first weeks of pregnancy, often before a woman even knows she is pregnant.
