
Marijuana is the most common illegal substance used during pregnancy in the US, and its usage is rising among pregnant women. It contains nearly 500 chemicals, including tetrahydrocannabinol (THC), which can pass through the placenta to the fetus. While evidence does not suggest marijuana causes anatomical defects, it may cause fetal growth restriction and attention, memory, and problem-solving issues later in life. THC also appears in breast milk, increasing the risk of abnormal neurological development. As such, smoking marijuana cannot be medically recommended during pregnancy and lactation.
| Characteristics | Values |
|---|---|
| THC testing during pregnancy | THC testing during pregnancy is not mentioned |
| Hospital testing for THC | Hospitals do not test for THC |
| THC and pregnancy | THC can pass to the fetus and is present in breast milk |
| Effects of THC on the fetus | Possible fetal growth restriction, abnormal neurological development, and stillbirth |
| Marijuana use during pregnancy | The most widely used illegal drug during pregnancy in the U.S. |
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What You'll Learn
- THC can be passed to the baby through breast milk
- Smoking THC is not condoned during pregnancy
- Marijuana is the most used illegal drug during pregnancy in the US
- Marijuana use during pregnancy may cause fetal growth restriction
- There is a potential link between marijuana use during pregnancy and problems with attention and memory in children later in life

THC can be passed to the baby through breast milk
The use of marijuana during pregnancy is a growing concern, with a range of 2% to 5% of pregnant women self-reporting marijuana use. This range is expected to increase with the growing trend of legalizing marijuana for medicinal and recreational purposes. The main psychoactive component of marijuana, tetrahydrocannabinol (THC), is known to be excreted into breast milk in small quantities. THC is a highly lipophilic molecule that is rapidly distributed to the brain and fat, with a half-life ranging from 20 to 36 hours in occasional users and up to 4 to 5 days in heavy users.
Studies have detected THC in breast milk for up to six days after use, with some reporting even longer durations of up to six weeks. The average THC concentration in breast milk was found to be 53.5 mcg/L, with a peak concentration of 94 mcg/L one hour after inhalation. The half-life of THC in milk is estimated to be around 12 to 39 hours, which corresponds to a clearance time of 2.5 to 8 days. The presence of THC in breast milk raises concerns about its potential effects on the infant's neurotransmitters, nervous system development, and endocannabinoid-related functions.
Professional guidelines recommend that nursing mothers avoid cannabis use due to the possible adverse effects of cannabinoids in breast milk on infant development. There is limited clinical data evaluating the potential teratogenicity in exposed human fetuses or the neurodevelopmental alterations in lactating infants exposed to cannabis. However, animal studies have shown that THC crosses the placenta and accumulates in breast milk, resulting in dose-dependent abnormalities.
While the specific effects of marijuana use during pregnancy and breastfeeding are challenging to determine due to confounding factors, it is clear that THC can be passed to the baby through breast milk. The American College of Obstetricians and Gynecologists (ACOG) recommends that women who are pregnant or contemplating pregnancy should be encouraged to discontinue marijuana use. Health care providers should advise breastfeeding mothers on the potential risks of marijuana exposure and the benefits of breastfeeding, encouraging them to reduce their marijuana intake significantly if they choose to continue.
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Smoking THC is not condoned during pregnancy
While the use of marijuana during pregnancy is common, with self-reported rates ranging from 2% to 5% in most studies, it is not condoned due to potential risks to the developing fetus. THC, the mind-altering compound in marijuana, can cross the placenta and reach the fetus, resulting in fetal exposure to harmful chemicals. This can lead to adverse effects on the fetus's growth and development, including fetal growth restriction and lower birth weight. Additionally, marijuana smoke contains respiratory disease-causing and carcinogenic toxins similar to those found in tobacco smoke, often at higher concentrations.
THC has been associated with an increased risk of stillbirth, and regular marijuana use during pregnancy has been linked to lower newborn birth weight. The effects of THC are not limited to pregnancy, as it can also be passed to infants through breast milk, potentially impacting their brain development.
The use of marijuana during pregnancy is particularly risky due to the increasing potency of the drug. Marijuana contains nearly 500 chemicals, and its consumption during pregnancy may negatively affect the baby's health in ways that are not yet fully understood. While research is ongoing to determine the specific effects of marijuana on pregnancy and fetal development, it is recommended that pregnant women refrain from using marijuana in any form, including smoking, vaping, or ingesting it through edibles.
It is important to note that the use of marijuana during pregnancy may be influenced by various factors, including the perception of its safety and cost-effectiveness compared to tobacco. However, the potential risks to the developing fetus are significant, and pregnant women should be encouraged to discontinue marijuana use. Women who are pregnant or planning to become pregnant should seek medical advice regarding marijuana use and explore alternative treatments for conditions such as morning sickness, nausea, anxiety, pain relief, or stress.
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Marijuana is the most used illegal drug during pregnancy in the US
It is important to note that hospitals do conduct tests for illegal substances during pregnancy, and THC is one of the substances that can be detected. While some women may be open about their marijuana use with their healthcare providers, others may not be aware of the risks or may not be receiving adequate information and support to stop.
Marijuana is the most widely used illegal drug during pregnancy in the United States. Its use among pregnant women has been on the rise, with an increase in prevalence, frequency, and the number of days of use. This trend is seen across all adult age groups, both sexes, and pregnant women specifically. While some states have legalized marijuana for recreational and medicinal use, it remains illegal at the federal level.
There are several risks associated with marijuana use during pregnancy. Marijuana contains nearly 500 chemicals, including the mind-altering compound tetrahydrocannabinol (THC). These chemicals can cross the placenta and reach the fetus, potentially causing serious health issues for the developing baby. The American Academy of Pediatrics has advised pregnant and nursing women to avoid marijuana use due to these risks.
Studies have shown that marijuana use during pregnancy may be linked to fetal growth restriction, resulting in the baby not gaining an appropriate amount of weight before birth. It can also increase the risk of stillbirth, preterm birth, and growth and development issues. Additionally, marijuana use during pregnancy may contribute to cognitive and behavioral problems in the baby.
Some pregnant women may view marijuana as a natural remedy for nausea and vomiting, often referred to as "morning sickness." However, healthcare providers should be consulted for safe treatment options, as marijuana use during pregnancy and breastfeeding can negatively impact the baby's health and well-being. It is important to provide accurate information and support to help pregnant women make informed decisions regarding their health and the well-being of their babies.
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Marijuana use during pregnancy may cause fetal growth restriction
It is important to note that marijuana is the most widely used illegal drug during pregnancy in the US. Its use is on the rise among all adult age groups, including pregnant women. Many women view it as a safe and natural way to treat nausea and vomiting, or "morning sickness". However, marijuana use during pregnancy is not safe and can cause serious, potentially deadly risks.
Marijuana use during pregnancy has been linked to fetal growth restriction, where a baby does not gain the appropriate amount of weight before birth. This restriction may be caused by fetal hypoxia due to the shift in the oxyhemoglobin curve caused by carbon monoxide. Studies have shown that carbon monoxide levels may be up to five times higher after marijuana use than after cigarette smoking.
In addition to fetal growth restriction, marijuana use during pregnancy has been associated with other serious problems, including stillbirth, preterm birth, and development issues. There is also evidence to suggest that marijuana use during pregnancy can lead to an increased risk of anemia in the mother, as well as impaired neurodevelopment in the fetus.
While the evidence on the specific effects of marijuana during pregnancy is limited, it is clear that it can pose serious risks to both the mother and the developing fetus. THC, the active compound in marijuana, can cross the placenta and reach the fetus, with fetal concentrations increasing after repetitive exposures. THC has also been detected in breast milk, posing additional risks to the baby, including problems with brain development.
Given these potential risks, women who are pregnant or contemplating pregnancy should be encouraged to discontinue marijuana use. It is important to seek medical advice and safe treatment options for morning sickness, rather than turning to marijuana.
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There is a potential link between marijuana use during pregnancy and problems with attention and memory in children later in life
Marijuana, or cannabis, is the most commonly used illicit drug in the United States. It binds to cannabinoid receptors in the brain, which are critical for brain development and the formation of brain circuits important for decision-making, mood, and stress response. These cannabinoid receptors are also crucial for a healthy pregnancy and fetal brain development.
Several studies have examined the effects of prenatal marijuana exposure on children's cognitive development and sensory processing capabilities. Research has identified a link between prenatal marijuana exposure and various outcomes in children, including cognitive development, with specific differences in sensory processing, attention, and visual perception. These effects on visual perception and attention may be evident as early as 15 months of age and could predict emerging issues with visual attention and habituation.
Longitudinal studies have found increased deficits in several cognitive domains for marijuana-exposed offspring, including attention, language comprehension, memory, visual perception, and visual reasoning. These studies suggest that in-utero marijuana exposure may lead to hyperactivity of the visual cortex, which is also associated with Autism Spectrum Disorder (ASD). Additionally, irregular visual sensory responsiveness has been linked to increased symptoms of Attention-Deficit Hyperactivity Disorder (ADHD).
While the literature shows mixed results, some studies suggest possible negative associations between prenatal marijuana exposure and neuropsychological functions in older children, including attention, memory, and impulse control. These studies indicate potential adverse effects on attention and perceptive abilities, as well as decreased general cognitive function, memory, IQ, and reading comprehension, especially in children over six years of age.
Given the potential risks associated with marijuana use during pregnancy, it is essential to educate the public about the possible dangers and encourage women who are pregnant or planning to become pregnant to discontinue marijuana use.
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Frequently asked questions
No, it is not safe to use marijuana during pregnancy. THC and other chemicals in marijuana can pass through a woman's placenta to her baby during pregnancy and may be harmful to the baby's health. It can also cause fetal growth restriction and increase the risk of stillbirth.
It is unclear whether hospitals test for THC during pregnancy. However, it is recommended that pregnant women do not use cannabis due to potential risks to the baby's health and development.
Using marijuana during pregnancy may affect the baby's development and increase the risk of pregnancy complications. It can also cause health problems in newborns, including lower birth weight and abnormal neurological development.
If you have used marijuana during pregnancy, it is important to talk to your doctor, midwife, or another healthcare provider. They can provide information about the risks and safe treatment options for morning sickness.

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