For those lucky enough to be able to breastfeed, it really is an incredible thing.
It allows new mums to bond with their little ones while protecting them from infections and diseases.
And while it isn’t for everyone, new studies show more than 73% women now start breastfeeding.
But one new mum has taken it to a whole new level – by pumping enough milk to feed 15 babies as well as her own son.
Chi-Chi LaFlare pumped 40,000 ounces of milk in 2016 alone to help mums who desperately want to breastfeed but can’t for various reasons.
She’s sacrificed a huge amount to be able to help other women over the year, and she never leaves the house without a pump.
Her incredible gesture also has a huge impact on her body.
Chi-Chi, who describes herself as a “natural overproducer”, decided to show exactly how much pumping so much milk every day changes her breasts.
She took two photos, one before her first pump of the day and one after.
And the difference really is incredible.
Other mums have praised Chi-Chi for sharing the powerful photo.
Kelsey Buenaventura writes: ” Oh man, you poor thing! It’s a blessing AND a curse, I imagine!”
Mum Susan Hinds added: “Oh my word! I remember how much it hurt to be that engorged! Way to go mama!”
Instagram user xslfx28 commented: “Oh the flashbacks iam getting right now! I will never forget that pain. you are an amazing momma so dedicated.”
Chi-Chi regulary shares photos on social media to document donating breastmilking.
She pumps about three times a day.
Donating breastmilk happens across the world including the UK.
While a mother’s own milk is always best for her own baby, as it’s designed just for them, in many situations this is just not possible.
In some cases new mums are too unwell to breastfeed or their milk production may have not started on time.
Milk can also be donated to premature or poorly babies whose mums feel under too much pressure and stress to produce enough milk.
Many NHS hospital trusts offer guidance on how to get involved.