From strands of baby's first haircut to their first tooth, some parents even tuck away the dried stump of the umbilical cord or the stick pregnancy test as a touching memento marking the milestones of their kids.
And the latest craze is breast milk jewellery, News reported.

Few issues polarise mothers more than breast-feeding, and all things related to breast-feeding, so wearing processed breast milk around the neck or in a bracelet has ignited some passions.

The jewellery, on sale at the online handmade marketplace Etsy, is definitely not for writer Ashley McCann, 34, in Naples, Florida.

She nursed both her boys, 6 and 9, and loved it, but she feels some sort of gross-out line has been crossed.
"This is the most hilariously absurd trend in mommy jewelry that I have ever heard about in my life. I think it is just flat-out weird, to be honest," she said.

In addition to finished jewellery, a search on Etsy produces sellers of breast milk soap and one offering a locket kit for the DIY inclined.

A couple of the sellers, both mums, said in interviews that they hit on the idea as they sought out unusual keepsakes of their special bonds with their babies during nursing.

The two would not reveal their recipes for processing the milk, which is covered with a glaze or clear resin after it is plasticised or dehydrated, forming a clay-like substance that hardens over time when at least one method is used.

Prices range from 15 dollars for the kit, which includes various locket designs, to 125 dollars for a double pendant in copper bezels with a matching vintage chain.

"What a wonderful way to preserve the 'liquid gold' that we are only able to make for a certain period of time. This can be passed down for generations and what a fantastic gift to give to your child, the root of their survival," reads the product description for the latter.

20 or so people contact Allicia Mogavero each day about the breast milk jewellery she began selling in 2007, at first mostly to friends.

She put her designs on Etsy about a year ago and has sold about 200 pieces, including pendants, bracelets, lockets and beads of breast milk alone for people to do with what they wish.

She personalises the jewelry with names in fancy script.

In all, she offers 36 items, using a five-step process to preserve a small amount of milk shipped to her as instructed.

Working the milk takes about four weeks and the resin needs a week or two to dry, she said.