What are the pregnancy risks for a hemophilia carrier?

Question

Hi doctor,

I am a carrier of hemophilia. My partner and I are planning for a pregnancy soon. I am worried about the chances of my baby inheriting hemophilia, especially if it is a boy, and I also want to know what risks I might face during pregnancy and delivery.

I have heard that women with bleeding disorders can have complications like heavy bleeding during and after childbirth, so I am quite anxious. Could you please guide me on what precautions, medications, or tests I should do before conceiving and throughout pregnancy to make sure that I and my baby stay safe?

Please guide.

Answer 1

Hi,

Welcome to icliniq.com.

I read your query and understand your concerns.

Hemophilia is caused by a genetic mutation on the X chromosome, leading to a deficiency in essential blood-clotting factors such as factor VIII or IX. It follows an X-linked recessive inheritance pattern.

A carrier mother has a 50 % chance of passing the affected gene to her children. If the baby is a boy, he has only one X chromosome, so the chance of being affected is high.

If the baby is a girl, she has two X chromosomes, so if one is affected, the other typically compensates, making her a carrier with no symptoms in most cases.

Once pregnancy is confirmed, management should begin with the following steps.

Tablet Norethisterone 5 mg, taken three times a day continuously for three months to manage heavy menstrual bleeding if started pre-conception.
Tablet Tranexamic Acid 5 mg should be taken twice a day until menstruation begins, to reduce bleeding.
Folic acid 5 mg should be started during the pre-conception period and continued through the first trimester to prevent neural tube defects.
The patient must consult a multidisciplinary team, including an obstetrician, hematologist, anesthesiologist, and genetic counselor if available.

Necessary investigations include the following.

Blood group and cross-matching.
Complete blood count.
Urine complete examination.
Random blood sugar.
Viral markers such as hepatitis B, hepatitis C, and HIV (human immunodeficiency virus).
Levels of clotting factors VIII and IX.

Ultrasound scans should be done at specific intervals, including:

A dating scan between seven and nine weeks.
A nuchal translucency scan between 11 and 13 weeks.
A detailed anomaly scan between 18 and 20 weeks
Growth scans every four weeks after 28 weeks.

Delivery should be planned at a tertiary care hospital equipped for high-risk pregnancies, with a senior obstetrician, senior anesthesiologist, senior hematologist, and a fully functioning blood bank.

Blood products must be arranged in advance. Due to the high risk of heavy bleeding during and after delivery, a full postpartum hemorrhage (PPH) management plan should be prepared.

I hope this information is helpful.

Thank you.