You cannot always tell. Sometimes the fertilised eggs implant very close together and it looks like one placenta. If the babies are in separate sacs there is probably no need to worry. Your doctor should be able to tell you.
The only way to be sure to have twins is to have the help of a doctor and implant several eggs.
This is a saying used when two people are very close and do everything together. The image is of a pair of conjoined twins.
A 450cc saline breast implant weighs 0.43 kg (0.95 lbs) and a 450cc silicone breast implant weighs 0.48 kg (1.06 lbs). These weights are for a single breast implant, not for two implants put together.
A 520cc saline breast implant weighs 500g. Note that this is for a single breast implant, not for two implants put together.
Twins that are joined together are referred to as conjoined twins. They are identical twins who are connected in some way, often sharing organs or body parts.
Twins can be identical or fraternal (monozygotic or dizygotic). For identical twins, one sperm fertilizes an egg. The zygote divides into two identical embryos. For fraternal twins, two separate eggs are fertilized. They both implant on the uterine wall, forming two zygotes.
A 750cc saline breast implant weighs 0.71 kg (1.58 lbs) and a 750cc silicone breast implant weighs 0.81 kg (1.79 lbs). These weights are for a single breast implant, not for two implants put together.
Both the twins are very close to their mother.
No more or less fun than being anything else. Twins can be close, but so can non-twin siblings. Twins can also be not close at all, it depends on the twins. Identical twins might have fun getting attention for being alike, but they also get attention when they don't want it.
A 750cc saline breast implant weighs 0.66 kg (1.47 lbs) and a 750cc silicone breast implant weighs 0.76 kg (1.67 lbs). These weights are for a single breast implant, not for two implants put together.
no