Over time, most people who sustain a ketogenic lifestyle stop losing weight and find a new stable weight (Hallberg 2018).  This is achieved when their natural instincts of hunger and satiety lead to an increase in dietary fat intake to balance out one’s daily expenditure.  But as long as dietary protein is kept moderate and carbs low, this dietary fat is used in place of body fat to produce ketones, so clearly nutritional ketosis can be maintained without any further weight loss.  We have named this a ‘eucaloric ketogenic diet’ (Phinney 1983).
If you have been weight stable for a period of time and you feel energetic and strong, maybe it’s time to revise your goals or at least your timeline. For now, focus on the rediscovered metabolically healthy you, feeling well and functioning well. You’ll be amazed at what can happen when you stop letting weight, especially a specific weight, be the marker of your success.

Remember that these are all perfectly understandable evolutionary design features. Higher estrogen levels during puberty drive fat gain as an energy reserve in case you get pregnant. During early pregnancy, they go into overdrive to “stock up” for the approaching challenge. Your body still hasn’t caught up to the 21st century; it still thinks its job is to keep you (a) alive, and (b) fertile in an environment of extreme food scarcity and a constant threat of famine. So storing extra fat at every opportunity makes perfect sense: back in the day, it could have meant the difference between life and death (or a healthy baby and a miscarriage).
Listen to your mum - dieting is faddish. Instead, improve the "quite" to "all" healthy and eat only nutritionally balanced, healthy foods. Cut out all sweets and junk foods, apart from an occasional treat, as humans would have always done till recent times. The exercise is important, and include plenty of stealth exercise, such as taking the stairs instead of the elevator and cycling to the shops instead of driving, etc.

Also, while your menstrual cycle may not affect weight gain or loss, losing or gaining weight can affect your menstrual cycle. Women who lose too much weight or lose weight too quickly may stop having a period, or have irregular periods. Women who have obesity may also have irregular periods. A regular period is a sign of good health. Reaching a healthy weight can help women who have irregular periods to have cycles that are more regular. Learn more in our Menstrual Cycle section.
Focus on cardiovascular exercise. Cardiovascular exercise is one of the best ways to lose weight. Studies show that cardiovascular exercise like walking, jogging, and running is highly effective at any degree of intensity.[24] That's because cardio/aerobic exercise works the muscles in your arms, legs, and hips, and increases blood flow to all sets of muscles.[25] Effective cardio exercises include:[26]
This Asian veggie dish is made by fermenting a blend of cabbage, radishes, and scallions with a seasoned paste of red pepper, salted shrimp, or kelp (koji) powder. Fermented foods are great for healing your gut thanks to the high levels of probiotics, but the unique strains found in kimchi may also help you stay slim: Researchers at Kyung Hee University in Korea induced obesity in lab rats by feeding them a high-fat diet. The group that got a Lactobacillus brevis supplement— the culture strain found in kimchi—was able to suppress the diet-induced increase in weight gain by 28 percent! If kimchi isn’t your thing, also consider adding one of these probiotic foods for a healthier gut to your diet.
Secondly, there are a few moves you will want to avoid such as weighted squats and lunges. Why? These grow your legs and glutes. If you want to thin out your thighs, it simply does not make sense to do them. The added weight will create tension on your muscle, thus cause them to work harder the next set which leads to hypertrophy (increased muscle size).
Muscle is more dense than fat, which can make you look leaner overall. Once you reach your desired weight, you may not feel as fit and toned as you would if you lost more fat and maintained your lean mass throughout the process. In order to decrease your body fat and get toned, you would have to gain muscle mass, essentially gain weight back, and try to lean out by burning fat. It is pretty counter-intuitive to lose weight from losing muscle weight just to try and gain back more muscle weight in the end. 
Coming back to this question of ketones and weight loss, when someone with some extra body fat begins a ketogenic lifestyle, perhaps it is the increased ability to burn these stores, coupled with the reduction in appetite and cravings, that facilitates initial weight loss.  In this scenario, keto-adaptation facilitates weight loss, but only as long as the reduced hunger and cravings allow one to comfortably eat fewer calories per day than one burns.
Like I said, all of this revamped progress started in August and the weight loss was slow. Slow like an average of 1 pound a week. Some weeks I would lose 1 or 2 pounds and other weeks I would lose nothing. For a while, I didn't notice any physical changes and if it wasn't for the fact that I was standing on a scale looking at a different number, I wouldn't have any guessed my body was changing. The biggest change for me during this time was not what my body looked like, but what it felt like. I noticed the food I ate (in combination with my work outs) left me with more energy. I felt less sluggish and more ready to take on the day. Completed workouts and nutritious choices filled me with confidence and empowerment.
For women specifically, remember that women’s bodies are designed to sustain a pregnancy, survive giving birth, and then nourish another human being through breastfeeding. While pregnancy and breastfeeding require as many as 500 extra calories per day, it’s no wonder that a woman’s body tends to store fat where it is difficult to lose. These biological activities require a huge output of energy from a woman’s body. To prepare for these enormous events, a woman’s body stores excess calories as fat around the thighs and hips.
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