Ask the Experts: Is too much exercise harmful during pregnancy?

I am 32 years old and a first-time mum.

For the first 24 weeks, I was active, walking at least 10,000 steps five times a week, doing simple stretching exercises and planks.

In my 25th week, a sudden onset of preterm contractions (threatened preterm labour) led to hospitalisation. A scan showed that my cervix was borderline short.

Did walking too much or planking cause my cervix to be shorter? How do I prevent this from happening again?

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