Q: Are caffeine and soda safe to consume when trying to conceive and during pregnancy? How much caffeine is too much when trying to conceive and during pregnancy?

A: Many sodas contain caffeine, but during pregnancy it's recommended you don't have more than 300 mg caffeine a day when you TTC and during pregnancy. A study published in January 2008 concludes that an intake of 200 milligrams or more per day, representing two or more cups, "significantly increases the risk of miscarriage."

Caffeine amounts in popular soft drinks, mg per 12 oz cans:

• Red Bull: 115 mg
• Mountain Dew: 55 mg
• Diet Mountain Dew: 55 mg
• Coca-Cola: 34 mg
• Diet-Cola: 34 mg
• 7-Up 0
• A&W Cream Soda 29
• Afri Cola 89
• Airforce Nutrisoda Energize 71
• AriZona Extreme Energy Shot 145
• AriZona Green Tea Energy 45
• Barq's Root Beer 22
• BawlsBuy 96
• Beaver Buzz 159
• Big Red 38
• Boo-Koo Energy 60
• Burn2 131
• BuzzWaterBuy 142
• Celsius 200
• Cherry Coke 34
• Chocolate Milk 8
• Coca-Cola BlakBuy 69
• Coca-Cola C2 34
• Coca-Cola Classic 34
• Coca-Cola Zero 35
• Cocaine Energy DrinkBuy 400
• Coffee (Brewed) 161
• Coffee (Decaf, Brewed) 8
• Coffee (Decaf, Instant) 4
• Coffee (Drip) 218
• Coffee (Instant) 86
• Coolah Energy 113
• Crunk 145
• Daredevil 150
• Diablo 136
• Diet A&W Cream Soda 22
• Diet Cherry Coca-Cola 34
• Diet Coke 45
• Diet Coke with Lemon 45
• Diet Coke with Lime 45
• Diet Coke with Splenda 34
• Diet Dr Pepper 41
• Diet Mello Yello 51
• Diet Mountain Dew 55
• Diet Mr. Pibb 40
• Diet Pepsi-Cola 36
• Diet Sunkist Orange Soda 42
• Diet Vanilla Coke 45
• Diet Wild Cherry Pepsi 36
• Dr Pepper 41
• Enviga 100
• Espresso 616
• Full Throttle 106
• Glaceau Vitaminwater Energy Citrus 25
• Go Fast 121
• H2O BlastBuy 75
• Hogan Energy 120
• Hot Cocoa 8
• Hype 114
• Inko's White Tea Energy 142
• Java Chai 180
• Jolt ColaBuy 72
• Kore Energy ShotBuy 667
• Lipton Brisk (all varieties) 9
• Lucozade 43
• MDX 71
• MDX, Sugar Free 75
• Mello Yello 51
• Mojo 114
• MonsterBuy 105
• Morning SparkBuy 121
• Mountain Dew 55
• Mountain Dew Amp 107
• Mountain Dew Baja Blast 54
• Mountain Dew Code Red 54
• Naked Juice Energy Smoothie 64
• Nestea Iced Tea 26
• Nestea Peach Green Tea 25
• Nestea Sweetened Lemon Iced Tea 17
• Nexcite 114
• NOS 300
• O Infused Water - Energize 48
• Oregon Chai (Concentrate) 98
• Pacific ChaiBuy 100
• Pepsi One 55
• Pepsi-Cola 38
• Pibb Xtra 40
• Pibb Zero 40
• Pimp JuiceBuy 122
• Powershot 1200
• Red BullBuy 116
• Red Flash 37
• Relentless 114
• Rip It Energy Fuel 150
• Rockstar 120
• Rockstar Energy Cola 113
• Rockstar Juiced 120
• Rockstar Zero Carb 180
• Royal Crown Cola 43
• Rush! Energy 72
• Shark 114
• Sky Rocket Caffeinated SyrupBuy 1200
• Slim-Fast Cappuccino Delight Shake 40
• Snapple Elements 72
• Snapple Tea 32
• SoBe Adrenaline Rush 114
• SoBe Energy Citrus 48
• SoBe No Fear 125
• Socko 120
• Socko Slim 120
• Spark 180
• Sprite 0
• Starbucks Bottled Frappucino 114
• Starbucks Double ShotBuy 240
• Starbucks Grande Caffe Americano 131
• Starbucks Grande Caffe Latte 87
• Starbucks Grande Caffe Mocha 87
• Starbucks Grande Cappuccino 87
• Starbucks Grande CoffeeBuy 279
• Starbucks Grande Decaf Coffee 9
• Starbucks Short Coffee 279
• Starbucks Tall Caffe Americano 116
• Starbucks Tall Caffe Latte 58
• Starbucks Tall Caffe Mocha 58
• Starbucks Tall Cappuccino 58
• Starbucks Tall CoffeeBuy 279
• Starbucks Tall Decaf CoffeeBuy 9
• Sun Drop 63
• Sunkist Orange Soda 41
• TaB 45
• Tab Energy 109
• Tea (Brewed) 71
• Tea (Brewed, Imported) 90
• Tea (Green) 23
• Tea (Iced) 71
• Tea (Instant) 39
• Tonic Water 0
• Upshot 960
• V 110
• Vamp 180
• Vanilla Coke 34
• Vault 70
• Water Joe 43
• Who's Your Daddy 150
• Whoop Ass 71
• Wild Cherry Pepsi 38
• Wired X294 221
• XSBuy 119
• XTZ Tea 154
• ZipFizz Energy Drink MixBuy 75