Could faint line on pregnancy kit be implantation bleeding?

At 12 weeks, the 2 cm head size of the baby displayed in the scans is normal. This is nothing but a predictable growth pattern. The baby's brain will continue to grow to the same body proportions during the pregnancy. An infant's cranial size at this stage is crucial in the development of the brain, thus this is an important parameter to control. 

It is common for some women to experience missed or delayed periods, but it is important to understand the underlying cause for this issue. There can be various reasons such as stress, hormonal imbalances, pregnancy, or certain medical conditions. If a woman misses her periods for more than a month, it is advisable to visit a gynecologist to rule out any potential health concerns.

Do take prenatal vitamins, eat healthy foods, and drink plenty of water. Don't smoke, drink alcohol, or take any medicines without consulting your doctor. Common symptoms like nausea and tiredness are mainly due to changes in hormone levels. Furthermore, eating small meals frequently and getting enough rest will be a big step forward in this regard.

Dried up blood spotting, cramps, and brown spotting can have various causes, even if you're not sexually active. It's possible that this could be related to hormonal changes, irregular periods, or other factors. Irregular are common, especially during the early years of menstruation.