Interpretation of Opiate Urine Drug Screens. Summary. Urine drug testing is highly reliable, but false positives can rarely occur for some drugs. As always, clinical judgment is necessary when interpreting test results. The length of time a drug can be detected in the urine varies due to several factors,
Mood changes during pregnancy can be caused by physical stresses, fatigue, changes in your metabolism, or by the hormones estrogen and progesterone.Significant changes in your hormone levels can affect your level of neurotransmitters, which are brain chemicals that regulate mood.ood swings are mostly experienced during the first trimester between 6 to 10 weeks and then again in the third trimester as your body prepares for birth.
Pregnancy and Headaches. Headaches During Pregnancy: Causes and Treatment. Headaches are one of the most common discomforts experienced during pregnancy. Headaches may occur at any time during your pregnancy, but they tend to be most common during the first and third trimesters. During the first trimester, your body experiences a surge of hormones and an increase in blood volume.