Parents are known to get creative when it comes to methods to tell twins apart - but one mum's decision has left some family members fuming.
The mum in question followed doctor's advice to get a "medical tattoo" on one of the babies in order to avoid confusion. While most people understand the decision, once the mother explains her reasoning, the woman's mother-in-law "lost her s**t" when she found out.
The mum explained in a Reddit post that after trying to have a baby for five years, she gave birth to fraternal twin boys, Adam and Jack - the latter who has a condition that required medication.
"Without going into detail, requires a shot once a week," she said. "Once he is older he can take pills."
The woman continued saying when she went back to work her mother-in-law offered to look after the boys, adding she "trusts her 100 percent" and that she had no problems giving him the injections - until about a month ago, when she accidentally gave the medication to the wrong child.
"Now they may be fraternal, but they look identical. I'll be honest my husband and I even mix them up sometimes," the mum admitted, saying her mother-in-law immediately missed her mistake and rang paramedics who took the boy to the hospital.
Although the mum assured her mother-in-law they were never in danger, the grandmother is devastated by her mistake and is refusing to baby-sit the boys, so they now attend daycare.
"This daycare has a nurse because some of the kids have medications, so she knew what to do, but the worry of mixing up the kids was a valid concern, [so the] doctor recommended a medical tattoo," the mum wrote.
Explaining that the "tattoo" is essentially a freckle and "no bigger than the end of a pencil eraser" which will probably fade in two to three years, after which time the boys would've developed more prominent features to tell them apart.
"So, after discussion with my husband we did it," she revealed. "He has a two-millimetre brown freckle on his earlobe. From entering the office to leaving it took 30 minutes. Never felt a thing."
Although they're happy with their decision, her mother-in-law was not.
"I tried to explain but she just freaked out, so I put both kids on the floor and told her to pick up Jack and find the tattoo," she wrote, saying she stripped them down to their skivvies' but failed to find it until she pointed it out to her.
"She's still p----d and ranting. Once I explain to others and they fail to find it they understand, but they still think I went too far in tattooing my child.
"I believe I took the necessary precautions recommended by the doctor and the tattoo will fade with sun exposure and as he grows."
"By the time he's five it probably won't even be visible or it'll just look like a faded freckle," she concluded the post, asking other Reddit users if she did the wrong thing.
However, Redditers agreed she acted in the best interests of her children's health.
"It's literally a fake freckle," one user replied. "It's not like you gave him a full sleeve of pin up girls and muscle cars. Also, it's to make it harder to accidentally kill him or his brother. You made the right call."
"I am an identical twin. A similar thing happened to us when we were really young," another user wrote. "I WISH someone had tattooed my ear."