Answer:
Retrospective cohort.
Explanation:
The chemical substances can cause mutation in the organism's DNA. This mutation can cause different types of cancers like leukemia, sarcoma and carcinoma.
The retrospective cohort study is performed in the group in which the specific disease and its outcome is already known. This study mainly focuses on the facts that whether the individuals were earlier affected by the particular disease or not. The case given in the question represents retrospective cohort.
Thus, the answer is retrospective cohort.
Answer:
Trimester 1- Flesh and tissue coming together. Trimester 2- Lungs and heart forming. Trimester 3- The baby gains weight. A misscarrage is when the baby doesnt attach to the uterine wall before it can survive on its own. A stillbirth is the death of a viable baby in the womb or as its being birthed. Gestational diabetes and placenta accreta can both happen during pregnancy.
Explanation: