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blood test first trimester

A 36-year-old female asked:
Dr. Dennis Higginbotham
30 years experience Obstetrics and Gynecology
Probably: It is likely that a vanishing twin would have some effect on the hormone levels for prenatal genetic screening tests. If the test result is abnormal ... Read More
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Dr. James Rochester
26 years experience Family Medicine
No: if they were identical twins, they would share the exact same genetic information. So no it should not make any difference. If they were fraternal twi ... Read More
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A 21-year-old female asked:
Dr. Carline Louis-Jacques
33 years experience Obstetrics and Gynecology
Vanishing twin: No, it would not affect your test result. Ultrasound would show it for a while, but the developing twin will eventually grow big enough to hide it fro ... Read More
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A 34-year-old female asked:
Dr. Barbara Coulter-Smith
32 years experience Obstetrics and Gynecology
It is different.: First trimester screens and the harmony test are for chromosomal abnormalities. The AFP tests for neural tube defects (spina bifida).
Dr. Jie Xu
Dr. Jie Xu answered
17 years experience Obstetrics and Gynecology
The msAFP is: To assess the risk of open neural tube defects i.e. Spina bifida, which is not tested by harmony or the first trimester screen. It is up to you if you ... Read More
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A 21-year-old female asked:
Dr. Brian Nguyen
11 years experience Obstetrics and Gynecology
Unlikely: These tests rely on the active production of various markers in the blood and so a demised twin this early on will be unlikely to affect the test. The ... Read More
A 33-year-old female asked:
Dr. Gurmukh Singh
49 years experience Pathology
Dilution: The blood volume expands during pregnancy and the concentration of some constituents of blood falls due to dilution. You should consult your doctor ab ... Read More
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A 38-year-old member asked:
Dr. Padmavati Garvey
A Verified Doctor answered
A US doctor answered Learn more
Depends: Standard blood tests for all patients in the United States would include a blood type, blood count, HIV test, syphilis screen, hepatitis test, rubella ... Read More
A 35-year-old female asked:
Dr. Georgia Latham
35 years experience Family Medicine
Not necessarily: Routine lab tests done during the first trimester of pregnancy usually include: complete blood count, blood type, and tests for sexually transmitted d ... Read More
A 18-year-old female asked:
Dr. Jeff Livingston
22 years experience Obstetrics and Gynecology
Abnormal: Bleeding in early pregnancy may be common but it's never normal. It should always be evaluated.
A 27-year-old female asked:
Dr. Elvia Greathouse
22 years experience Obstetrics and Gynecology
Early Pregnancy: What you are experiencing is quite common in early pregnancy. As long as you are not having bleeding like a period, or cramping, you should be fine. ... Read More
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A 30-year-old female asked:
Dr. Patrick Connerly
A Verified Doctor answered
A US doctor answered Learn more
Need iron: Iron level is low-which is common in late pregnancy. You are making new blood for you AND your baby. Iron supplementation would improve your and you ... Read More

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