chemicals can cause miscarriage, slow down the growth of the baby, or cause birth defects. During the first three months of pregnancy the organs and limbs are being formed. This is the period in which the baby is most sensitive to chemicals which cause birth defects.
When is the baby most sensitive to chemicals that cause birth defects?
The last three months of pregnancy is the period in which the baby is most sensitive to chemicals which cause birth defects. False In Occupational Reproductive Chemical Stressors List, letter "R" represents: Reproductive Hazard Related questions QUESTION What does the transverse septum give rise to?
What harmful effects can chemicals have on my pregnancy?
"What harmful effects can chemicals have on my pregnancy?" Some chemicals can cause miscarriage, slow down the growth of the baby, or cause birth defects. During the first three months of pregnancy the organs and limbs are being formed. This is the period in which the baby is most sensitive to chemicals which cause birth defects.
Why is it important to know about chemical reproductive hazards before pregnancy?
5) Because you may not know that you are pregnant during the first three months, it is important to know about chemical reproductive hazards in your workplace before becoming pregnant.
What are the reproductive health effects of pregnancy?
10) Reproductive health effects may include menstrual cycle effects, infertility, miscarriage, birth defects and developmental disorders. ... Nice work! You just studied 3 terms! Now up your study game with Learn mode. The last three months of pregnancy is the period in which the baby is most sensitive to chemicals which cause birth defects. ....
Which of the following is a chemical stressor?
Chemical stressors may include: Organics—containing carbon (e.g., dioxins, furans, PCBs, flame retardants, hydrocarbons, perfluorinated compounds (PFCs), some pharmaceuticals, phthalates, volatiles, semi-volatiles (e.g., polycyclic aromatic hydrocarbons [PAHs]).
What is defined as an agent that causes abnormal development of the embryo?
A teratogen is any agent that causes an abnormality following fetal exposure during pregnancy. Teratogens are usually discovered after an increased prevalence of a particular birth defect.
What is PR&Ms?
Process Review and Measurement System.
What does PR&Ms mean quizlet?
arrange PR&MS stages in correct order. plan, do, check, act.
In which period are teratogens the most harmful?
Time of exposure: Teratogens are most harmful early in pregnancy, starting about 10 to 14 days after conception to about 8 weeks into pregnancy.
What is the critical period during embryogenesis for teratogenesis?
The critical period of exposure appears to be 24 to 36 days after fertilization. Infectious agents can also cause a variety of birth defects and mental retardation when they cross the placenta and enter the fetal blood stream.
Which of the following are causes of falls on stairs?
Common Causes for Staircase Slip and FallBroken or Missing Handrails. ... Uneven/Poorly Built Stairs. ... Inadequate Lighting. ... Weak Flooring/Staircase Collapse. ... Wet/Icy Stairs. ... Loose Carpeting. ... Discarded Objects and Other Obstructions.
What does it mean if a product is adulterated Milady quizlet?
What does it mean if a product is adulterated? It contains an ingredient that will harm users under normal conditions.
What are chelating agents Esams?
What are the chelating agents? Certain drugs (e.g. EDTA, Calcium Disodium Versanate) are used to reduce the amount of lead absorbed by the body. If ventilation and engineering controls are not adequate: use respirators. Which of the following are physical properties of lead?
What is the name of the first cavity formed during embryonic development?
At the beginning of the second week, the cells of the inner cell mass form into a two-layered disc of embryonic cells, and a space—the amniotic cavity—opens up between it and the trophoblast (Figure 5).
What is the difference between a morula and a blastocyst?
Morula is a mulberry like solid mass of 8-16 cells called blastomeres formed by cleavage of zygote while the blastocyst is a hollow sphere of 64 cells formed by the rearrangement of blastornr. res of morula. It has a cavity called blastocoel and an inner cell mass within.
Which of the following major events of prenatal development happens first?
The process of prenatal development occurs in three main stages. The first two weeks after conception are known as the germinal stage, the third through the eighth week is known as the embryonic period, and the time from the ninth week until birth is known as the fetal period.
What is the stage of implantation?
Implantation consists of three stages: (a) the blastocyst contacts the implantation site of the endometrium (apposition); (b) trophoblast cells of the blastocyst attach to the receptive endometrial epithelium (adhesion); and (c) invasive trophoblast cells cross the endometrial epithelial basement membrane and invade ...
Which trimester is the most dangerous for birth defects?
Harmful exposures during the first trimester have the greatest risk of causing major birth defects. This is because many important developmental changes take place during this time. The major structures of the body form in the first trimester. These include the spine, head, arms and legs.
What are the major birth defects?
Birth defects are typically classified as “major” if they cause significant medical problems and need surgery or other treatment. Heart defects, spina bifida, and clubfeet are examples of major birth defects.
How many weeks are birth defects common?
In general, major defects of the body and internal organs are more likely to occur between 3 to 12 embryo / fetal weeks. This is the same as 5 to 14 gestational weeks (weeks since the first day of your last period).
How long does the brain develop during pregnancy?
Major, structural brain development lasts until about 16 fetal weeks (18 gestational weeks). However, the brain continues to develop for the rest of the pregnancy, after birth and through young adulthood.
What is the background risk of a pregnancy?
Every pregnancy starts out with a 3-5% chance of having a birth defect. This is called the background risk. If an exposure can increase the chance for birth defects, the chance depends on what body part is developing at the time of exposure. Once a body part has formed, it is no longer at risk to develop major birth defects. Some exposures could still affect a body part’s growth and/or function.
How long does it take to change from gestational age to embryonic age?
Gestational age begins with the first day of a woman’s last menstrual period. This day is usually two weeks before a baby is conceived. This means that you can change gestational age to embryonic/fetal age by subtracting two weeks.
What is the critical period of development?
Critical Periods of Development. December 1, 2019. In every pregnancy, a woman starts out with a 3-5% chance of having a baby with a birth defect. This is called her background risk. This fact sheet talks about the critical periods of development and types of birth defects that can result from exposures at different stages of pregnancy.
What are Birth Defects?
A birth defect is something that’s visibly, internally, or chemically abnormal about your baby’s body that is present when they are born.
How many pregnant women are exposed to pesticides?
A report from California’s Defects Monitoring Program showed that three out of every four pregnant women are exposed to indoor pesticides, which also puts the fetus at the risk of being exposed to these potentially harmful substances.
How far away from the mother's home are limb defects found?
One study that investigated limb defects in relation to an area of cornfield within 500 meters of the mother’s home. It found that limb birth defects increased in relation to the cornfields.
How many people have congenital heart defects?
Congenital heart defects affect approximately 1% of live births. Pesticide exposure has been suggested in some studies as a factor for congenital heart defects.
How many babies are born with birth defects each year?
Each year, birth defects affect 1 in every 33 babies born in the United States. That’s about 120,000 babies per year.
What fish should pregnant women avoid?
Food and Drug Administration (FDA) released guidelines which recommended that pregnant women limit mercury in their diets by avoiding to eat swordfish, king mackerel, and tilefish as older fish accumulates more mercury in its tissues.
What is the critical period?
In pregnant women, there is a stage called the critical period. Most studies say that this is during the first three months of the first trimester of pregnancy.