When a single fertilized ovum develops, splits in two, and produces two babies, the babies are called fraternal twins

The fallopian tubes connect the ovaries to the uterus and guide ova out of the ovaries

In both males and females, the urinary tract is considered part of the reproductive system

The testes contain tiny tubes called the seminiferous tubules, where sperm develop.

The uterus serves as the birth canal, or the passage through which a baby is delivered

Five days after fertilization, the zygote has cleaved seven times, forming a ball called an embryo

During implantation, the embryo burrows into the endometrium

Chemicals such as alcohol, nicotine, and many drugs can pass from the mother to the developing baby through the placenta

Most expectant mothers should add about 100 calories to their daily diets

Children whose mothers smoked during pregnancy have a lower risk of dying from sudden infant death syndrome (SIDS)

Pregnant women should choose low-impact activities, such as walking and swimming, as their sources of exercise

A pregnant woman can reduce her risk for gestational diabetes by eating a healthful diet, maintaining a healthy weight, not smoking, and exercising regularly

Pelvic inflammatory disease (PID) is often caused by sexually transmitted infections.

Breast cancer is the second leading cause of cancer-related death in women

Endometriosis can cause painful menstruation

Genes that are always expressed in offspring are called _______ genes

During ejaculation, ______ a substance that contains sperm and other fluid, is secreted

Smoking can cause ______ , or the death of a fetus

The ability to have biological children is known as ______

A fertilized ovum is called an ______

The embryonic membrane that develops around an embryo is known as the

_______ is a condition in which the mother experiences high blood pressure during pregnancy.

Substances that may harm a developing fetus include ______

Which trimester is considered the most critical for fetal development?

Why is the first trimester so important?

At what week does the embryo become a fetus?

What substance covers the fetus around 20 weeks to protect its skin?

What major development happens around Week 6 of pregnancy?

Which of the following is a healthy choice that supports fetal development?

What begins developing rapidly around Week 24?

Which habit can negatively affect fetal growth and increase the risk of birth defects?

What is lanugo?

What happens around Week 32 of pregnancy?

Which action best promotes healthy fetal brain development?

How long does a typical full-term pregnancy last?