Wondering About Molar Pregnancy Causes? We Have It Covered

by | July 17, 2018

If you’ve landed here, chances are you’ve heard the words ‘molar pregnancy’ and you’re wondering what are molar pregnancy causes? Is it was something you could prevent or what are the odds of it happening again?


Key Points

  • A molar pregnancy is at the start of a pregnancy, with a tumor that grows in the uterus
  • If ignored and not given immediate medical attention, it can present a potentially dangerous medical threat to the woman.
  • It, unfortunately, nearly always ends in loss of the pregnancy.
  • Symptoms involve vaginal bleeding and intense vomiting.
  • Experiencing a molar pregnancy does not prevent you from having a healthy viable pregnancy later on.


What exactly is a molar pregnancy?

Also known as ‘hydatidiform’ or simply, ‘HM’, is a tumor that grows in the uterus when a pregnancy first begins. It prevents the placenta from properly growing, leading to loss of the pregnancy, and developing into cysts that prevent nourishment and air reaching the baby.

Molar pregnancies are rare, accounting for less than 1% of pregnancies in the USA, and the majority of women who experience a molar pregnancy go on to have healthy pregnancies later in life.

However, if a molar pregnancy is left undiagnosed or treated, it can cause a rare, but deadly form of cancer.


Molar pregnancy causes.

It’s natural to wonder about the causes of a molar pregnancy, and if this is something you did prior to finding out you were pregnant. However, it is a fundamental issue with the embryo chromosomes and there are two distinct types of molar pregnancy causes.

  1. Partial Molar Pregnancy – where the embryo may start to grow, but it cannot survive. The embryo has two sets of chromosomes from the father, and only one from the mother, causing the embryo to have sixty-nine chromosomes.
  2. Complete Molar Pregnancy – There is no embryo or placenta, the mother’s eggs are missing, and there are just the fathers forty-six chromosomes in place. It is possible that this has happened when the father’s chromosomes are duplicated, or when two sperm fertilizes one egg.


Secondary molar pregnancy causes.

  • Older than thirty-five, or ‘advanced maternal age’, as with most risks associated with pregnancy, the risk increases when you are over forty.
  • Have experienced one before
  • Experienced more than two miscarriages previously.


Signs to watch for

If you experience any of the molar pregnancy causes below, please contact your health provider as soon as possible.

  • Vaginal bleeding
  • cysts or globs of fluid coming from your vagina
  • Extreme vomiting
  • Pelvic pain


Diagnoses of molar pregnancy.

Diagnoses are usually with an ultrasound to determine a molar pregnancy causes and will show that the placenta has stopped or never started growing. Blood tests will equally show that your Hcg has stopped increasing as the baby stopped developing.


Medical professionals will perform a D&C, also knows as a dilation and curettage, which removes the lining of your uterus, and will monitor your Hcg levels for a few days afterward, to ensure they are decreasing as expected.

In some cases, around twenty percent, some women experience persistent molar growth, with is named ‘GTD’. This can be treated in one of two ways.

  • Hysterectomy
  • Chemo treatment


Resources After Loss

Raise Vegan

Associate Editor, USA | Contactable via [email protected]



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